### tide:

Red tide
* are a natural phenomenon.
* are also dinoflagellates but behave more like plants
  - responsible for paralytic shellfish poisoning
  - an overabundance of reddish algae that can kill fish
  - cause by a species of dinoflagellate
  - caused by toxic dinoflagellate blooms
  - composed primarily of one species of dinoflagellate which has been rapidly growing
  - conditions when a dinoflagellate population increases to huge numbers
  - dense blooms of certain toxin-producing algae
  - very dangerous because they can kill an animal that ingests the substance
* bloom of microscopic algae that attacks the nervous systems of fish.
* can accumulate in mussels - a part of the whooping crane diet.
* can also occur in upper beach tidal pools left by a high spring tide
  - use up the oxygen in seawater, suffocating sea life
  - be dangerous, particularly to humans who enjoy eating shell fish
  - become a problem because of their domino effect in the food chain
* can cause fish to die and can produce toxins that contaminate mussels, clams and oysters
  - serious illness and death on other life form - even humans
  - extend for miles along a shore line and last for weeks on end
  - produce a toxin dangerous to sea life and people
* contains a naturally occurring toxin dangerous to humans in high concentrations.
* generates a neurotoxin that affects the nervous systems of fish and other creatures.
* is algal blooms
  - also potentially harmful to human health
* is caused by an algae bloom, which produces a neurotoxin
  - blooms of microscopic algae which produce a potent neurotoxin
  - toxins produced by the algae
  - causes by a red colored toxin that can make humans sick
  - made up of patches of single- cell plants that cloud coastal waters
  - the common name for a marine biotoxin called paralytic shellfish poison
* is the common name for the explosive growth of certain kind of algae in marine waters
  - growth of certain types of algae in marine waters
* naturally occurring organism in deep water areas of the Gulf.
* occur naturally off coasts all over the world
  - on both sides of the Atlantic, off Florida, and along the Pacific coast into Alaska
* occurs when microalgae burst, releasing reddish brown toxins into the water.
* population explosion of tiny algae that contain a dangerous toxin.
* poses a health risk to humans as well.
* represents a major natural source of mortality for manatees in the southwest region.
* result of a bloom of small microorganisms.

Slack tide
* is tide
  - when the water is at it's calmest and the tide is neither coming in nor going out
* occur about every six hours and usually limit divers to two dives a day
  - three or four times

### tide:

Spring tide
* are bigger, with higher high tides and lower low tides than neap tides.
* are the highest and occur nearly one day and a half after new and full moon
  - largest tides
  - ones that rise and fall most
* coincide with the new and full moon.
* happen every two weeks
  - just after every full and new moon, when the sun, moon and earth are in line
* is the high tide to set sail.
* move the water further up the rivers.
* occur a. at new moon and first quarter moon
  - approximately twice a month during the time of the Full Moon and the New Moon
  - around the times of full moon and new moon
  - at full moon and new moon
  - during the full moon and the new moon

Storm tide
* are a hurricanes worst killer.
* can bury the island's plants under a foot or more of sand.
* is the combination of storm surge and the normal astronomical tide
  - the storm surge and the normal high tide