| type | Status | Habitat |
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FISHES |
STABLE |
All CONTINENT |
 Cuttlefish are exclusively marine species and can be found in most marine habitats from shallow seas to deep depths and in cold to tropical seas. |
 While they are young, most of their diet consists of small shrimp and crustaceans, including larvae. As they grow older, they graduate to fish, crabs, and other mollusks. |
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Like other cephalopods, these species have the ability to change the color of their skin. Their pores contain sacs called chromatophores that have different colored pigments inside. They use these chromatophores to change colors, and even produce color patterns or flashes across the skin.
While fish have a swim bladder, and sharks have an oil-filled liver, cuttlefish have a different way to remain buoyant in the water. They use a porous structure, conveniently called a cuttlebone, to stay neutrally buoyant. This allows them to "float" in place in the water, without sinking or rising. No other animal, not even other cephalopods, have the same structure.
Unlike humans and many other animals, which have round pupils, cuttlefish have "W" shaped pupils. Their odd eyes are unique because they have no blind spots at all. These cephalopods can see in objects front of them, and objects behind them, at the same time.