cuttlebone

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cuttlebone

marine biology

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anatomy of cuttlefish

In cuttlefish
…internal calcified shell called the cuttlebone. The approximately 100 species of cuttlefish range between 2.5 and 90 cm (1 to 35 inches) and have somewhat flattened bodies bordered by a pair of narrow fins. All species have eight arms and two longer tentacles that are used in capturing prey and…
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locomotion constraints

In cephalopod: Locomotion
Cuttlefishes, because of the large cuttlebone, are less active animals and spend most of their life lying on or hovering slightly above the bottom. Both jet and fins are used, the latter more frequently.
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