Merpeople/H2O

When they catch deadly Fish Fever, mermaids are known to sprout a set of gills, but as long the poison is in their system. Once cured, the gills will disappear and the merpeople will be healthy again. As they likely lay eggs and have scales, it is unknown if they can be classified as mammals, though their similarities to humans both before and after performing the Legs Spell implies such.
Long orange-scaled tails and orange-scaled tops, tails end in a dolphin-shaped fluke, short dorsal fin running along the back of the tail from the waist to a little more than halfway down their tail. Mermen have long blue scaled-tails that end in a fluke that differs from that of mermaids, same dorsal fin. Warm-blooded, 
Merpeople native from the sea do not have a human form by conventional means, although they have the ability to give themselves one casting the Legs Spell with the Full Moon or by using a moonstone. Natural merpeople can have some difficulty getting used to walking at first when they obtain legs for the first time, but can become accustomed to it with a lots of practice. Since they never had a human form before, their bodies would be completely naked when they obtain legs for the first time.
Body fluids such as tears and saliva, despite containing a high percentage of water, aren't enough to make a merperson transform.
Water is much more than a merperson's home; it can help heal or revive them. However, this only applies to certain illnesses or injuries as it takes more than water to heal a merperson who is struck by the Moon Ring or the power of the Trident. Merpeople who stay in the sea don't get sick.
A moonstone can be used to help heal a merperson from certain injuries or traumas.
When the Legs Spell breaks, merpeople lose their clothes they're wearing in human form which only reappear when they become human again. Their hair keeps its natural length, but any hair-ties, headbands, hair clips or hairspray disappears, along with their clothes. When they dry, their hair returns to whatever hairdo it was in. As shown when Emma was trapped in mermaid form due to a full moon, if any additional clothing is added to them, upon returning to human form, they vanish as opposed to being still on them; while not confirmed, its possible they will return upon another transformation or they cease to exist.
Moon Rings and the Trident, as magical objects, remain even if their carriers are on land under the Legs Spell or not.
A merperson's tail is also very strong, this is shown when Emma saves Zane Bennett by smashing in the steel door on Miss Chatham's boat, or when Nixie breaks the frozen surface of the pool in the Grotto. Their upper bodies, specifically their arms, are also as strong; being able to drag themselves back to water or onto land, despite their heavy tails. Zac shows this strength after his first transformation; where he pulled himself onto a tall pier out of the water without the use of knees to help pull himself up.
The transformation also occurs when merpeople are exposed to snow or ice, but since Southern merpeople from the South Pacific never interact with snow, they will also develop Snow Rash and become feverish, as there is no snow in the South Pacific. The only way to cure them is by applying dried seahorse powder onto their skin. Northern, Western, Eastern and some Southern merpeople from the Indian and South Atlantic Ocean are immune to Snow Rash. Northern merpeople born and raised in icy waters are presumably resistant to the cold since they swim in colder waters around Canada and the Arctic Circle.
Merpeople can use hair dye, but if it's applied in their aquatic form, they lose it upon drying off. However, physical injuries sustained in one form, at least a scratch from toxic rainbow coral, remains in both forms.
A merperson's respiratory system can extract oxygen from both water and air, allowing them to breathe freely both underwater and on land. Also, merpeople are shown to be able to hold their breath for more than fifteen minutes at a time if needed, with no noticeable discomfort.
Natural predators are orcas, whales, and giant squids.
==== Reproduction ====
It is unknown how merpeople reproduce. As mermen are banished to land when they are young and most mermaids both have not seen them for a very long time and are very scared of them, they do not seem to be required for mermaids to produce offspring, implying that it can be accomplished either through magic or unique physiology where the parent(s') sex is insignificant. As mermaids are the only ones depicted as having children, it is unknown if mermen can reproduce on their own as well, with or without magic.
Young merpeople are referred to as "hatchlings".
It is unknown what the offspring of a natural or transformed merperson and a human would be like, but they may be considered halflings, as depicted in the separate canon of The Bureau of Magical Things. In the history of merpeople, there were children born to a human and a merperson, though.
=== Mermaid Adventures ===
In H2O: Mermaid Adventures, mermaids have different colored, glittering tails, different with accessories in their hair that match their tops, and silver or gold armbands on both of their arms. They can also speak non-aquatic languages (such as English) underwater, and communicate with sea creatures fluently without having to speak a different language.
== Culture ==
Although considered as the same creature, mermaids and mermen have different behaviors. Mermaids are determined to learn more about their powers and master to control them, instead of gaining more. They even have Mermaid School, which teaches their young how to use their powers and using them wisely. They live in pods and are never alone, and aren't really as solitary as mermen (although Lyla is considered a loner, but isn't that solitary and cooperates with the other two). Mermaids usually travel with or hang around in groups of at least two or three other mermaids.
Mermen, on the other hand, are left by their mothers to be raised on land by humans in a adoptive human family, most likely to hide from the mermaids after losing the war to them, which explains why mermaids mentioned that mermen haven't been seen for a while. Originally, both mermaids and mermen lived in groups or pods, but after the great war that happened between mermaids and mermen, mermen no longer lived in pods in the sea. They are described as solitary and territorial. They are also described as power-hungry by the mermaids, and would do anything to obtain power. Zac does not really have this typical mermen behavior, but upon seeing the Trident for the first time, he becomes obsessed with obtaining it. He also believes that he is destined to possess it after he falls into a Moon Spell but then snaps right out of it the moment he touches the Trident for the first time. Unfortunately, after being betrayed by the mermaids, Zac comes to see them as corrupt, trouble-making, selfish, devious, and power hungry; though his girlfriend Evie is an exception as she's a cursed human. He doubles his efforts to get the Trident and denounces the mermaids as his enemies, vowing to claim vengeance on them for all the trouble they caused him. Later, as the mermaids make many unsuccessful attempts to strip Zac of the Trident, he even goes so far as to try take Mako from the mermaids after he mistakenly believes that they are calling in reinforcements to attack him for the Trident. All of this causes Zac to inadvertently recreate the war between mermaids and mermen and nearly finish the task the mermen of the past began.
Mermaids who fell in love with human beings were banished from their pods as it's forbidden for mermaids to fall in love with land people. For unknown reason, mermaids appear instinctively terrified of cats, but this can also be conquered, as is the case with Rita and her cat Poseidon.
While fearful of land people over the risk of exposure, mermaids simultaneously see themselves as inherently superior to and look down upon them. This extends to humans transformed into merpeople by the power of the Moon Pool, who they have been known to refer to as "half-merpeople" (in contrast to them being "real merpeople").
However, this view is not shared by all mermaids and some may be fascinated by the land, and even can fall in love with its people just like Sirena, Ondina, Rita and Mimmi did.
Mermaids from the past used to play an ancient game similar to tug-of-war, where a mermaid may use whatever powers she has to pull a human ship to her side. Real ships were used in the past, but like the siren song, it was likely eventually forbidden.
On their birthdays, mermaids give gifts rather than receive them; opposite of land people. Their mothers are known to raise them, but if she has a son (which happens to be a merman) she is forced to give him to adoption to be raised in a foster human family on land. Mimmi was raised by her mother, but at some point she was forced to give her to the Mako Pod until her disappearance. Sirena's only known family member is her sister Aquata, but no other relative as a mother was mentioned, while Nixie, Lyla and Ondina's family were never mentioned. Pods will even accept and raise mermaids from other pods like Mimmi, who is a Northern mermaid raised since a young age at the southern Mako Pod.
According to Ondina, mermaids and mermen share the secret that binds them together, and that mermaids and mermen who are in the same pod felt like siblings towards one another, even if they might had no biological relations. This statement was confirmed as Nixie and Lyla stated that Sirena was like a sister to them.
Mermaid knowledge is limited to the creatures of their oceans. Mimmi was unaware that penguins are only native to the Southern Hemisphere, despite the fact that she actually can talk with them.
== Pods ==
: Main article: Pods
There are pods of hundred of mermaids and formerly mermen worldwide, while the Mako Pod consisting of over a hundred. On full moon nights, mermaids all around the world honor the moon with a ceremony. According to Ondina, the Northern Pod knows the best spells and potions. In each pod, there's a Mermaid Council, with Veridia as the Head in the Mako Pod. They make the laws and rules for the pod to follow.
Some of these are:
* It is forbidden to Sirens sing their enchanted songs (exclusive only in the Mako Pod, as it is unknown if other pods allow mermaids to use their ability).
* It is forbidden to reveal themselves, to associate with or to fall in love with land people (it is unknown if this extends to other non-human beings).
* It is forbidden to cast the Legs Spell, whether by the Full Moon or by using a Moon Ring.
* It is forbidden to let human beings go through metamorphosis in a Moon Pool.
* It is forbidden to swim too close the shore or where they could be seen.
* It is forbidden to reveal their powers to humans.
* When a merman hatchling was born, a newborn was to be given up to foster human families on land with the use of a forbidden Legs Spell. (abolished in the Mako Pod)
If a member broke one of the rules of the pod, their Mermaid Council will strictly punish the merperson by permanently banishing him/her, and he or she will be forced to live without their pod. Despite this, a Mermaid Council had the power to lift a merperson's banishment, welcoming them again.
Mermaids of the pods use the Full Moon as a source of magic and power. They create Moon Rings out of blue moonstone to help increase their magic and can use them to accomplish many complex feats and spells, as the rings can heal injuries but can also cause destruction.
Hatchlings go through training to be worthy of these rings. Mermaid School teaches them to use their powers correctly and to be sensible in the difficult choices made through mermaid life.
== Diet ==
Mermaids and mermen live on a seafood diet, but they're able to eat land food. However, many of them think land food and drinks disgusting, choosing to eat prawns, seaweed and drink sea water instead. A human-turned merperson will still prefer land food, however, he or she can eat or drink anything a merperson native from the sea can, like raw fish and sea water. A full moon can also warp a human-turned's mindset into being free-spirited like a natural mermaid and give them insatiable cravings for raw fish. Also, the Northern Pod had invented a delicious marshmallow, which can be eaten by both humans and merpeople.
As mermen are raised on land by human foster families, they are accustomed to survive on a diet of land food just like their adoptive parents or human siblings. Zac notably started binge-eating prawns for breakfast after his merman self was restored.
== Moon Pool ==
: Main article: Moon Pool
Moon Pools are unique pools that can turn regular people into merperson when the Full Moon passes over, resulting in the Metamorphosis. The two known Moon Pools are located on Mako Island, approximately 50 km off the Gold Coast, Queensland, Australia and in the Irish coast in a set of caves. These Moon Pools are known to have turned Cleo Sertori, Emma Gilbert, Rikki Chadwick, Isabella Hartley, Gracie, Louise Chatham, Julia, Charlotte Watsford, and Evie McLaren into mermaids, and broke the Tailless Spell on Zac Blakely.
On special occasions, the Moon Pool reacts to the Full Moon magically and unleashes special effects. Only a human-turned merperson is susceptible to these events, and is still unknown if their sea-born counterparts are completely immune to all of these following:
* The Lunar Eclipse: During it, any human-metamorphosed-merperson would be stripped of their tailed true selves and magical powers by twelve hours if they are in the waters of any active Moon Pool during the event, temporarily restoring their old human selves once more. After this period, the Eclipse's effects on a merperson will wear off on their own and their tailed true selves and abilities will be fully restored.
* The Moon of Weather Magic: During a rare planetary alignment, the moon will increase the water-affiliated powers of any human-metamorphosed-merperson, granting them weather powers if they are in the waters of any active Moon Pool during the event.
* The Moon of Fifty Years: Once every fifty years another planetary alignment takes place when all the planets are lined up with the moon. During it, any human-metamorphosed-merperson would be permanently stripped of their tailed true selves and all of their magical powers if they are in the waters of any active Moon Pool during this event, ultimately turning them back into human beings once more. It is unknown if they can undergo metamorphosis again after their human self is fixed, though it seems unlikely. There is also a special potion of full moon magic amplified by fifty that can be used to replicate the Moon of Fifty Years's effects on a merperson.
Sirens are gifted sea-born mermaids with the ability of siren singing, lures and attracts sailors to their watery graves with beautiful enchanted songs.
== Powers and Abilities ==
: Main article: Merpeople Powers
The Moon Pool grants all Merpeople Powers to a human who comes alone to it on a Full Moon night, aside from transforming them into a mermaid or merman. When two or more people enters, the Moon Pool grants them individual powers as it chooses. When mermaids and mermen left the pods that they were born, their powers become linked with a specific Moon Pool when they are accepted as part of their new pod. It happened to Mimmi, who's known for leaving her native Nothern Pod as a hatchling to come live in warmer waters around Mako since then. Mimmi's brother, Zac, as a merman, could not live in a pod of mermaids and was left with the Blakely family on dry land instead before he was eventually accepted as part of the Mako Pod. The seventh full moon cycle in the life of a hatchling or a human that recently went through metamorphosis causes sudden escalations of merman powers, deepening their connection with the specific Moon Pool that metamorphosed them and gave them their magical powers even more. It is also known that this cycle would repeat itself on them each time their abilities would be restored, if they were previously stripped beforehand, like when the Tailless Spell would be broken on them.
=== Natural Merpeople Abilities ===
* Limited Transformation - When a merperson is completely dry, their tails transform into human legs. This is known as the Legs Spell, and sea-born mermaids can perform it when the Full Moon is up, or even in daytime if they are in possession of Moon Rings. Neverthless, those mermaids and mermen native from the sea does not have a human form by conventional means. Ten seconds after touching water or by being exposed to snow or ice, they will revert back to their true forms. A long orange tail with a matching top for mermaids and a long blue tail for mermen. Only Moon Rings remain in both forms as they are magical themselves. Humans who undergo Metamorphosis possess this ability since their first transformation. Merpeople hybrids also presumably have this ability since they were born.
Able to hold breathe without any discomfort for at least fifteen minutes, go unconscious if no air for any longer.
* Enhanced Senses - Merpeople may have slightly enhanced senses suited to life underwater due to living in the sea. To sea born mermaids, land people smell horrible, even the average hygienic human emits this smell but only mermaids can detect it. However, they can get used to the smell. By smelling Rita's supply of squid ink, Lyla could identify where the species of squid came from. In H2O: Mermaid Adventures, mermaids have the same range of hearing as dolphins. With this sound, they can hear things humans cannot but their human half allows them to hear sounds cetaceans can't.
Able to swim for days without exhaustion, endurance and stamina, can dive to incredible depths. Can swim at incredible speeds and thus their bodies are encased in bubbles. Amphibious, their respiratory system can extract oxygen from water and air to breathe freely both underwater an on land.
* Aquatic Adaptation - Depending on where they are born and raised, merpeople may be resistant to certain elements in that area. Northern merpeople may be resistant to low temperature as they swim in cold, icy waters like the seas around Canada and the Arctic Circle. The Canadian Mermaid wasn't suffering from the cold or hypothermia, even though she was swimming in an area where the temperature was very low and the humans, she attacked were dressed in thick clothing to keep warm, further implying the low temperature and merpeople's cold resistance. Despite this, all merpeople are resistant to the cold of the depths even if they are from the Southern hemisphere.
* Siren Singing - A musical/voice-related magical ability that allows a Siren to put boys and men into an irresistible, hypnotic trance in which he will follow them wherever they go. Only mermaids can have this ability this ability can't be learned and only merpeople native from the sea have it, except when under the Moon Spell in the case of transformed mermaids.
* Zoolingualism - Some sea-born mermaids have the unique ability to understand and speak the language of sea creatures (for instance, dolphins and whales). It is unknown if the ability can be learned, but it is unlikely. Nixie, Sirena, and Rita are known for demonstrating this ability with dolphins, while Mimmi also speaks dolphin, humpback and blue whale, and northern penguin. In H2O: Mermaid Adventures, the main characters gain the ability to speak with all sea creatures, including cetaceans, cephalopods, fish, marine reptiles, and crustaceans.
* Moon Spell Control - The Moon Spell Control is an essential skill that every sea-born merperson has to learn to master properly, as it lets them survive the Full Moon's spell without letting it control them. According to Sirena, merpeople native from the sea learn it when they are hatchlings. For this reason, they need to learn to concentrate on letting the moon's magic flow through their bodies rather than resist it, thus can walk or swim freely when the Full Moon is up. However, over time, they would grow immune to its effects, like the others.
* Extended Lifespan - While merpeople do age, their lifespan is far longer than that of humans. Weilan once stated that due to Ondina's personality, they would become friends only in "a couple of centuries", which indicates merpeople can live for at least a few centuries. It's unclear if this applies to human-turned merpeople as well, though it likely does, as they appear to be biologically identical to naturally born merpeople. Like all other merpeople traits, this slower aging is suppressed by the Tailless Spell; thus, merpeople affected by the spell grow old at the same rate as humans.
=== Merpeople Magic ===
: Main article: Merpeople Spells
Merpeople have a natural gift for spell making or using ingredients found in nature for potions. They make potions to perform things their magic powers cannot like heal wounds, transform animals, grant wishes and neutralize anything, including other spells.
Lewis McCartney found a book, "Mermaid Mythology" that held a recipe for a Mermaid's Potion that could give mermaids the power to grant wishes. It may have possessed more potions like the wish-granting spell.
The Water Dragon's Cold Fire is the only known magic that can strip a sea-born merperson's powers and abilities.
Moon Rings are a huge part of mermaid magic and every mermaid is taught how to use one and all receive a ring after they finish Mermaid School. Moon Rings are a vital part of a mermaid's survival as merpeople use them for healing what potions cannot, enhance the natural world for camouflage, grant them human form, and amplify their inherent magical powers. With their rings, mermaids can cast many spells. Mermaids can also craft other magical items like the Jiao Long Bracelet. This has red stones, implying mermaids have altered the magic of the stones for a specific purpose. Rita mentions that only a mermaid can wear the bracelet.
== Weaknesses ==
* Snow Rash - Southern merpeople from the South Pacific, such as of the Mako Pod, will be infected with Snow Rash after physical contact with snow. It is followed by several negative symptoms and prevents merpeople from using their powers to warm themselves. A merperson who tries to use his/her power will only generate cold and lower the temperature. The only way to cure Snow Rash is a Dried Seahorse Powder that Rita contains stored within a silver seahorse. To heal, the dust must be sprinkled on the affected part of the skin, and it will immediately disappear. This is because they live in warm and cozy weather, and under normal circumstances never come into contact with snow: Northern, Western and Eastern merpeople are immune to Snow Rash.
* Fish Fever - Is caused by a strange, rainbow-colored coral which houses a poison that affects merpeople, causing them to be overexcited and hungry for seafood, but the more the poison seeps into their system, the more ravenous they get. For Emma, her orange scales turned white and scales even appeared on the skin, her hands became webbed, her nails turned black and later into claws, her skin became more monstrous; her neck sprouted a set of gills, her hair started to turn green, her eyes turned yellow, and she made monster-like noises. Fortunately, she was later cured when Lewis sprayed an antidote developed by Laurie on her.
* Ambergris - Is an old substance that at one point in time was used to make beauty products such as ladies perfume. It comes from the intestines of a whale and it can be used to attract mermaids. In "Irresistible", Zane Bennett finds some old ambergris which Nate later tries on. The smell from the ambergris makes him stink but it also makes him literally irresistible to Cleo, Emma, and Rikki.
* Allergic Reaction - Mermaids seem to have an allergic reaction to a certain substance of aftershave, which cause their powers to blow uncontrollably when they sneeze. Mermaids also had an allergic reaction to a formula that Lewis created to allow them to get wet while in human form, without transforming. The allergic reaction however only manifested as red spots all over their bodies when mermaids were in their human form. Besides this, Lyla, upon being asked by Dr. Blakely of what sort of allergies she has, she calmly responds with: "Only kelp spores in the Atlantic."
* Sickness - Merpeople don't get sick, unlike humans. However, they can be infected if they come across a sick land person and can spread it to other merpeople as well. The symptoms involve oozing heat from out of their bodies and breathe fire whenever they sneeze. Rita Santos invented a remedy for such situations after coming across such occasion's multiple times. Mimmi, being inexperienced with such situations, tried to concoct a potion, but it only worked temporarily, after which the sick merpeople will feel cold and eventually sneezes snow.
* Moon Pool's Magic - Every merperson is magically linked with the specific Moon Pool that turned them and gave them their magical powers. If a Moon Pool is ever destroyed or being deprived of its Moon Water, all merpeople linked with said pool will perish and die with it, unless said pool would eventually be restored before all of them could die. It is still unknown if their human-turned-merpeople counterparts are completely immune to it or not, based on the 2008 and 2014 destructions of Mako's Moon Pool. Furthermore, based on the Moon's phases and the planetary alignments, all Moon Pools around the Earth can react magically to these phenomena and affect merpeople in a variety of ways. It is unknown if this extends to merpeple native from the sea, and even hybrids, or not.
* Unmetamorphosis - Merpeople can be permanently stripped of their tailed true selves and magical powers when under the Moon of Fifty Years in any active Moon Pool, ultimately turning them back into a human being and breaking any connection they might had with the specific Moon Pool that metamorphosed them and gave them their magical powers. It is currently unknown if they can undergo metamorphosis again after their human self is fixed, though it seems unlikely. It is unknown if sea-born merpeople are immune to the effects of the Unmetamorphosis, but they're most likely not. There is also a special potion of full moon magic amplified by fifty which needs to be used on a merperson in an active Moon Pool during a regular Full Moon and another merperson could use it to extract another's powers in the same way as when under the Moon of Fifty Years. Furthermore, a power-stripped merperson would have his/her bond with the specific Moon Pool broken permanently, as a result of becoming a human being. Furthermore, like all other merpeople traits, the extended lifespan of a merperson would also be suppressed; thus, merpeople bewitched by the Moon of Fifty Years would grow old at the same rate as humans. Also, during a Lunar Eclipse, any human-metamorphosed-merperson will lose their tailed true selves and magical powers by twelve hours, if they are in the waters of any active Moon Pool during the event, temporarily returning to their old human selves. After this period, the Eclipse's effects on a merperson will wear off on their own and their tailed true selves and abilities will be fully restored.
* Water Deprivation - Although merpeople can cast a spell to grant themselves human legs, they cannot remain in such state for so long and need to swim regularly in order to stay healthy. Water deprivation can kill a merperson who, by some reason, are unable to touch water. Water deprivation would presumably only weaken a hybrid, as opposite to outright killing them, though it is unconfirmed.
* Magic - Despite being magical in nature themselves, merpeople are still susceptible to the effects of magic, like when Erik, a merman was transformed into a cat by the Golden Spider Coral from the South China Sea, when a mermaid named Nerissa was cursed into becoming a fearsome Water Dragon by Aurora's spell, or when a merman Zac Blakely was bewitched by his mother's spell that made him tailless.
* Water Dragon's cold fire - A water dragon is also capable of breathing cold, blue flames from its jaws, which has dangerous unmetamorphosing effects on a merperson once burned.. This magic also makes the merperson completely immune to the effects of the Metamorphosis, meaning he or she can never become a merperson again by jumping into an active Moon Pool and their old/new human status remains permanent. There is no cure nor counter-spell that negates the effects of the Water Dragon's cold fire, though. Once his or her old/new human self is fixed, it is impossible for a bewitched merperson to restore their tailed true selves and abilities back ever again. Almost all Eastern mermaids, except for a hatchling named Weilan and her elderly grandmother, were turned into human beings by the Water Dragon Nerissa's cold fire, resulting in the ancient pod's disbandment. Evie McLaren, a human-turned mermaid, also returned to her old human self by sharing the fate of mermaids from the Eastern Pod. It is also known that if another merperson tries to reverse its effects through any means, then it would bewitch them with the Legless Spell, which can only be reversed by e.g. the Eastern technique to negate magic or presumably even the Neutralizing Potion.
* Moon Spell - The Moon Spell is the reaction of the Full Moon in every merperson. They can fall under this spell by standing outside on a Full Moon night, by looking directly at the Full Moon, or just by its dangerous reflections on glasses, mirrors and liquid-filled bowls. Once the Full Moon sets, the spell will be lifted until the rise of the next Full Moon. An active Moon Pool can even protect a merperson of the Full Moon's influence. It is revealed that merpeople native from the sea learn Moon Spell Control when they are hatchlings. However, over time, they would grow immune to its effects, like the others.
* Mortality - Despite their extended lifespan, merpeople are still mortal, as they still do age and eventually die. They also share other of the same weaknesses as some other supernatural and non-supernatural species, including humans, (e.g. dehydration, decapitation, heart-failure, suffocation, snapped neck, electrocution, etc.).
* Trident's moonstone - The Trident was capable of detecting mermaids, even if in invisible state, by glowing when one was nearby, and draining the strength out of mermaids. It was also able to siphon even a rebel merman's powers right into the stone.
* Enchantment Song - Male merpeople (also known as mermen) are susceptible to a Siren's enchanting lullabies, like the entire malekind itself. In the Northern Pod, their Enchantment Song could affect mermaids from other pods as well. The purpose of the song was the same. If a foreign mermaid hears it, it will enchant her and make her find a target to sing to, but Northern mermaids are immune. To stop the enchantment, mermaids must sing a counter version of the song.
* It is unknown if merpeople native from the sea are immune to the Full Moon's special events on a Moon Pool, like the temporary twelve-hours Lunar Eclipse or the dangerous power-stripping Moon of Fifty Years, but they're most likely not.
* The dangerous reputation of the Northern Pod may have been inspired by the legends of dangerous, wicked mermaids which are most common in the Northern Hemisphere.
* Just like in the legends, mermaids native to the sea have a slight streak of vanity and often comb their hair with seashells.
* Merpeople native to the sea tend to be given names with meanings that relate to water in some way (such as Rita), including literal translations to "water" (such as Aquata), or relating to mythological figures related to it such as deities (such as Neptina) and spirits (such as Nixie and Ondina). They may also be named after celestial or weather phenomenon (such as Aurora), pretty things (such as Jewel), or colors associated with the sea (such as Veridia).
* Since natural mermaids avoid being seen by humans, they dive fully clothed into the water; former humans like Cleo, Rikki, Emma, Bella, and Evie prefer to wear swimsuits so they can enjoy the beach in private before swimming.
* It's unknown how transformation would affect pregnancies; which would be even hard on former human mermaids, if the mermaids don't have similar internal biology.
* Due to not being active with the pod due to their banishment, Eastern mermen made it out unharmed and survived the disbandment of the Eastern Pod.
|-|Powers=
Merpeople Powers are abilities that all mermaids and mermen possess granted to them by the specific Moon Pools around the world.
If a regular person comes into the Moon Pool when the Full Moon passes over, they will be transformed into a mermaid or merman. When two or more people enters, the Moon Pool grants them individual powers as it chooses. Mermaids and mermen native from the sea are born with all powers, the regular and weather ones. When mermaids and mermen left the pods that they were born, their powers become linked with a specific Moon Pool when they are accepted as part of their new pod. It is also known that if a human being somehow absorb Moon Water, they will receive special powers inherent of a true mermaid or merman whilst in their system.
During a rare planetary alignment, the moon will increase the water-affiliated powers of any human-metamorphosed-merperson, granting them weather powers if they are in the waters of any active Moon Pool during the event.
The seventh full moon cycle in the life of a hatchling or a human that recently went through metamorphosis causes sudden escalations of merman powers, deepening their connection with the specific Moon Pool that metamorphosed them and gave them their magical powers, even more. It is also known that this cycle would repeat itself on them each time their abilities would be restored, if they were previously stripped, like when the Tailless Spell would be broken on them.
Also, human-turned merpeople are susceptible to the Full Moon's special events on a Moon Pool, like the temporary twelve-hours Lunar Eclipse or the dangerous power-stripping Moon of Fifty Years. A water dragon is also capable of breathing cold, blue flames from its jaws, which has dangerous unmetamorphosing effects on a merperson once burned. There is no cure nor counter-spell of the Water Dragon's cold fire, though. Once his or her old/new human self is fixed, it is impossible for a power-stripped merperson to get their powers and abilities back. The Dragon's cold fire is the only known magic that can strip a sea-born merperson's powers and abilities, and is still unknown if they are completely immune to all of the Full Moon's special events on a Moon Pool, unlike their human-turned counterparts who are known to be susceptible to all of them.
Regular powers include hydrokinesis
=== Hydrokinesis ===
Hydrokinesis is the elemental ability to create, control, and manipulate liquid water at will. Hydrokinesis has been used to float water in the air or spray it in the form of a jet blast. One can also control water and mold it into any shape they desire. It's also used to mold water into a multitude of shapes, ranging from simple water balls to a miniature mermaid figurine and three-headed snakes. Hydrokinesis also allows the user to multiply the water molecules, making the shape of the water to grow more and expand in size, despite the small amount in a glass to begin with. When a merperson with this power is in the Moon Pool during a special planetary alignment, it is greatly strengthened to Aerokinesis, the power to summon wind gusts or float beings or objects in mid-air.
=== Hydro-Cryokinesis ===
Hydro-Cryokinesis is the elemental ability to freeze water or anything containing liquid, ranging from human body to the water molecules in the air. This ability can cause things to become brittle enough to break, such as an electronic lock. It can also be used to render people immobile by freezing only their wet clothing. Mixed with Hydrokinesis, this power can create ice sculptures or ice balls, but it would eventually melt or shatter. At first, it implies that Hydro-Cryokinesis could only freeze things with water over it. But several times, Emma was able to freeze, cool, and lock objects with her powers without the aids of water, implying that she can freeze the small water molecules around those dry objects. If a merperson with this power is in the Moon Pool during the special planetary alignment, it is drastically enhanced to full-fledged Cryokinesis, in which a merperson can freeze anything without the presence of liquid water and can make it snow.
Emma using this power for the first time (gif)
List of Merpeople to Have This Power:
* Emma Gilbert
* Lyla
* Mimmi
* Ondina
* Cam Mitchell (temporarily; under the effects of Moon Water)
* Charlotte Watsford (formerly)
* Evie McLaren (formerly)
=== Hydro-Thermokinesis ===
Hydro-Thermokinesis is the ability to heat and boil the water. It's the most volatile and dangerous of all three original powers. Throughout the series, we discover that this power can easily get out of control. Thermokinesis is most useful when the merpeople need to dry off their tails faster. If a merperson with this ability is in the Moon Pool during the special planetary alignment, it is enhanced to Pyrokinesis and Electrokinesis: the power to start and put out fires, as well the ability to summon a lightning from the sky from anywhere.
List of Merpeople to Have This Power:
* Rikki Chadwick
* Lyla
* Mimmi
* Ondina
* Nixie
* Sirena
* Zac Blakely
* Charlotte Watsford (formerly)
* Evie McLaren (formerly)
* Erik
=== Gelidkinesis ===
Gelidkinesis is the power to turn water and all things that contain water into a jelly-like compound. A merperson using it also shows the ability to change its viscosity. In "Queen for a Day", Bella's allergic reaction affected her mermaid powers, which caused her powers to be channeled through sneezing. Every liquid present in that same room was affected by this ability.
List of Merpeople to Have This Power:
* Isabella Hartley
=== Substanciakinesis ===
Substanciakinesis is the ability to harden water into a substance similar to glass or crystal.
List of Merpeople to Have This Power:
* Isabella Hartley
== Weather Powers ==
=== Aerokinesis ===
The power to summon wind gusts or float beings or objects in mid-air. This is a enhanced version of Hydrokinesis.
Lyla using Aerokinesis to try and take away Zac's powers
The girls using powerful Aerokinesis
Charlotte using powerful aerokinesis
List of Merpeople to Have This Power:
* Cleo Sertori
* Lyla
* Charlotte Watsford (formerly)
* Ondina
* Sirena
* Weilan
=== Atmokinesis ===
The power to control and manipulate the weather itself and its various aspects.
Rita creating a storm in a bottle
Nixie creating a cloud in a bottle
Sirena making it rain
Sirena making it thunder
Ondina creating a storm cloud
List of Merpeople to Have This Power:
* All merpeople
=== Combined Atmokinesis ===
This is a supremely powerful combined ability that only Cleo Sertori, Emma Gilbert and Rikki Chadwick have shown to possess. When two or more different human beings come into the active Moon Pool during a Full Moon, they are each metamorphosed into a merperson and each of them is granted one individual power which can be enhanced during a special planetary alignment in the Moon Pool, granting them weather powers, allowing them later to collectively alter the aspects of a weather. When tho or more mermaids or mermen combine their powers of air and wind, ice and snow, and lightning and electricity grants them complete control over the weather and its various elemental aspects. This is first seen in "Stormy Weather". They have shown the capability to create even stronger thunderstorms, and electrical storms and have greater control over them.
List of Merpeople to Have This Power:
* Emma Gilbert
* Cleo Sertori
* Rikki Chadwick
=== Cryokinesis ===
The power to freeze anything without the presence of liquid water or making it snow. This is a enhanced version of Hydro-Cryokinesis.
Emma freezing the watermelon
Charlotte freezing the door
Emma making it snow
List of Merpeople to Have This Power:
* Emma Gilbert
* Charlotte Watsford (temporarily)
=== Electrokinesis ===
The power to summon a lightning from the sky. This power is the upgraded version of Hydro-Thermokinesis.
List of Merpeople to Have This Power:
* Rikki Chadwick
* Rita Santos
* Nixie
* Zac Blakely (via Trident; formerly)
* Cam Mitchell (via Trident; formerly)
* Sirena
=== Pyrokinesis ===
The power to start and put out fires. This is a enhanced version ofHydro-Thermokinesis.
List of Merpeople to Have This Power:
* Rikki Chadwick
* Charlotte Watsford (formerly)
* Evie McLaren (formerly)
* Sirena
== Other Merpeople Powers ==
=== Essence Manipulation ===
Essence Manipulation is the power to manipulate an object's or person's essence. To take the essence, one only has touch the object or person. Mimmi demonstrated that power when she took Evie's Essence and tried to remove her newly acquired mermaid tail.
List of Merpeople to have This Power:
* Mimmi
=== Invisibility ===
Invisibility is the power to become invisible. It is also shown that they cannot stay invisible forever. The user puts their hand in a fist motion and move it half circle. It remains unknown if only sea-born merfolk can become invisible, or if it's a power also shared by those who came into a Moon Pool under the Full Moon.
Lyla and Sirena turning invisible (gif)
Mimmi and Rita turning invisible (gif)
Ondina and Mimmi turning invisible (gif)
Zac and mermaids turning invisible (gif)
List of Merpeople to have This Power:
* All natural merpeople
* Eastern Pod (formerly)
* Transformed merpeople (presumably)
=== Invisibility Detection ===
Invisibility Detection is the power to see invisible merpeople. It remains unknown if only sea-born merfolk can become invisible, or if this is a power also shared by those who came into a Moon Pool under the Full Moon. Neverthless, Rita Santos and Zac Blakely were the only ones to display this power (the latter did while wielding the Trident).
List of Merpeople to have This Power:
* Rita Santos
* Zac Blakely (via Trident; formerly)
* All natural merpeople (presumably)
* Eastern Pod (presumably; formerly)
* Transformed merpeople (presumably)
=== Limited Transformation ===
It's the counter-spell of the Legs Spell. Just a one drop can change them into their true selves. Ten seconds after touching water, they will revert back to their true forms. All clothing, including tops and accessories are absorbed by the merperson and vanish during their transformation which only reappear when they're dry. Only Moon Rings remain in both forms as they are magical themselves. Humans who have changed into merpeople possess this power since their first transformation. Since merpeople native from the sea do not have legs, they can cast the Legs Spell with the Full Moon or a Moon Ring. In H2O: Mermaid Adventures, mermaids transform by being enveloped in colored light.
List of Merpeople to Have This Power:
* All transformed merpeople
* All natural mermen
* Gracie (Formerly)
* Rita Santos
* Weilan
* Weilan's Grandmother
* Charlotte Watsford (Formerly)
* Zac Blakely (as a result of the Tailless Spell)
* Lyla (Formerly)
* Sirena
* Nixie (Formerly)
* Ondina
* Mimmi
* Evie McLaren (Formerly)
* Veridia
* Neptina
* Amaris
* Naia
* Jewel
* Ava
* Nerissa
=== Precognition ===
Precognition is the power to see the future, through visions and predictions. With this power, one can see how events might turn out. White Mermaid saw the thieves coming to steal her treasure before they even learned of her location and she knew about the danger Stanley Finch posed before he even came to Dolphin City.
List of Merpeople to Have this Power:
* White Mermaid
=== Siren Singing ===
Siren Singing is an ability that allows a Siren to put a boy or man into an irresistible, hypnotic trance in which he will follow her around. There is also the Northern Song, who when is sung by a Northern mermaid can enchant mermaids from others pods.
The Canadian Mermaid singing the Northern Pod Enchantment Song
List of Merpeople to Have This Power:
* Sirena
* Canadian Mermaid
* Cleo Sertori (under the influence of the Full Moon, formerly)
=== Speed-Swimming ===
Speed-Swimming is one of the most used merpeople abilities in H2O: Just Add Water and Mako: Island of Secrets. It allows merpeople to swim at an incredible speed. This power is mostly used for racing other merpeople or escaping from boats and other merpeople, or just to get somewhere faster.
List of Merpeople to Have This Power:
* All merpeople
=== Telekinesis ===
Telekinesis is the power to move objects and people with the mind, often in ways not visible to the naked eye. With this power, the user can levitate objects and people, hold an object or person in place, pull objects and people towards the user, push objects and people away from the user, and alter an object or person's directional course.
=== Telepathy ===
Telepathy is the ability to communicate without the use of any known human senses. With this power, one can contact another person mentally, without fear that someone overhears the conversation. The White Mermaid could enter the dreams of other mermaids to inform them of her visions and predictions. However she could communicate with them when the mermaids were awake as seen when she told the girls where the galleon was.
List of Merpeople to Have this Power:
* White Mermaid
=== Volume Reduction ===
Volume Reduction is the ability to shrink objects. The hand motion for this power is to use the thumb and index finger and move up and down with the fingers. The first time we see the Merpeople using this power is in "Sirena's Secret". Zac uses this power to improve Carly and Cam's vocal cords, while the mermaids used it to shrink lemons and Sirena's vocal cords. Rita mentions that it can be extremely useful to a mermaid caught in a cave-in or in an encounter with a killer whale. This power is not seen being used after "Sirena's Secret." This power may be linked to water pressure.
Rita using Volume Reduction with lemon
List of Merpeople to Have This Power:
* All merpeople
* Eastern Pod (formerly)
* Transformed merpeople (presumably)
=== Vision Sharing ===
Vision Sharing is to see what another merperson is seeing. This power is unique to Mimmi and Zac and is possibly only shared between siblings. Throughout Season 2 and through Season 3, Mimmi and Zac has been able to see what each other see at certain times.
List of Merpeople to Have This Power:
* Zac Blakely
* Mimmi
=== Tower of Light ===
Tower of Light is the ability to create a tower of light by combining Hydrokinesis, Hydro-Thermokinesis, Gelidkinesis and Substanciakinesis. A Tower of Light can be used to repel a comet.
List of Merpeople to Have this Power:
* Cleo Sertori
* Rikki Chadwick
* Isabella Hartley
* Eva †
=== Zoolingualism ===
: Main article: Zoolingualism
Zoolingualism is the unique ability to understand and speak the language of sea creatures, such as dolphins and whales. Some merpeople native from the sea are born with this ability. Just like Siren Singing, this ability can't be learned and only them possesses it.
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