### seafood:

Octopus
* All octopuses are venomous, but only a few species pose a significant threat to humans.
* Many octopuses produce venomous secretions.
* Most octopuses can eject a thick, blackish ink in a large cloud to aid in escaping from predators.
* Most octopuses live in shallow waters, where grabbing prey and holding on to the bottom is useful
  - only one or two years
  - shorter lives with shorter egg development, etc
  - singly in small rocky crevices or other protected places on the ocean bottom
* Octopi catch prey.
* Octopi have glands
  - muscles
  - poison glands
  - suckers
  - tentacles
  - types
* Some octopus also have a potent venom that can cause death to humans.
* Some octopuses can change their color according to their mood
  - use their chromatophores for more than camouflage
* also crawl over reefs, probing with their arms for hidden prey
  - feast on tanner crabs
* also have a trick unknown to Nautilus
  - an excellent sense of touch
  - learn by watching a process without having tried it before
  - use water but in a variety of ways that change their environment
* are a source of nutrition for many marine species.
* are active at dawn and dusk, leaving their den to hunt
  - night or during the early evening hours and tend to live alone
  - also capable of changing their color, depending on mood and environment
  - carnivorous, meaning they eat meat
  - cephalopods
  - characterized by their eight arms , usually bearing suction cups
  - efficient hunters, with crabs, lobsters, and shrimps among their favorite dishes
  - found in all seas on the Earth
  - great at escaping
  - highly intelligent , possibly more so than any other order of invertebrates
  - intelligent animals and as a result their behaviour is varied and fascinating
* are located in oceans
  - molluscs
  - mollusks, related to oysters, clams and snails
  - part of octopuses
  - shy when the sun's up, too
  - solitary animals that live alone in dens
  - some of the most antisocial, unfriendly animals alive
  - strongly territorial and defend a home lair in a rock crevice or hole in a wreck
* are the most intelligent of all the invertebrates
  - only invertebrates capable of tool manipulation
  - thoroughly antisocial
  - well known for squeezing into tight spaces
* begin their lives as eggs, tended by their mother.
* belong to a group of animals called mollusks.
* bite their prey using a small parrotlike beak located in their mouths.
* camouflage themselves in response to a threat.
* can be either batch reared or reared in individual containers
  - count and distinguish different colours
  - open jars, squeeze through tiny openings, and hop from cage to cage for a snack
* can use the water jet to play, too
  - their bodies as a nets to trap fish
* catch their prey in a similar way like other cephalopods, by help of their tentacles.
* come in all sizes and are found throughout the world.
* consume mostly crustaceans and mollusks, most often small crabs and scallops.
* eat bottom-dwelling crustaceans
* even learn to unscrew lids to get at food.
* feed chiefly on crabs, clams, and snails
  - on crabs, snails, clams, small fishes and shrimps
* have a mouth underneath their tentacles
  - relatively short life span, and some species live for as little as six months
  - slit-shaped rectangular pupil
  - comparatively short lifespans
  - dog-sized brains
  - eight arms, which are extended from the mantle
  - excellent vision
  - got neither, they lack any trace of a shell, internal or external
  - highly complex eyes which compare to human visual acuity
  - keen eyesight
  - no shells but the most advanced mollusc
  - one of the stranger and more poignant mating and breeding sagas
  - other unique abilities which most mollusks lack
  - short lives
  - the most complex brain of all the invertebrates
  - three hearts
  - tremendous gripping power
  - two reproductive strategies
  - very short lifespans, and some breed once before they die
  - well-developed eyes, similar to our own
* is seafood
* lack a shell all together.
* live close to land and in deep water.
* live in dens on the sea floor
  - different habitats between the tidal zone and up to seven kilometres depth
  - short, lonely lives
* love to destroy lab equipment.
* mate when they are two years old, and the male dies soon afterward.
* move about by crawling or swimming.
* often break out of their aquaria and sometimes into others in search of food.
* pierce the shells of their prey, injecting poison that causes paralysis.
* reach their largest size in the cool temperate waters of the north and south Pacific.
* reproduce sexually.
* spray a cloud of ink at their predators.
* swim with their arms trailing behind.
* tend to be profoundly antagonistic towards each other.
* thrive at the base of the ridge.
* use dens for shelter, and discard remains outside the den in midden piles
  - their eight sucker-lined arms to capture their prey and move about on the ocean floor
* vary greatly in size.
+ Octopus, Colors
  * Some octopuses can use their chromatophores for more than camouflage. If they are not blending in with their surroundings, they can signal their feelings using color. When they are relaxed, for example, they are a dull, grayish brown or orange-tinged color. When they become angry, they can become red. If they feel scared, they may turn white
  - Intelligence: Cephalopods
  * In laboratory experiments, octopuses can be readily trained to distinguish between different shapes and patterns. Octopuses often break out of their aquaria and sometimes into others in search of food