Anatomy
The cuttlefish is a species of invertebrates that can reach body lengths of up to 50cm. The head of the cuttlefish is at the base of their mantle and has two large eyes situated on it. There are eight arms radiating out from the head, and a sharp beak like jaw that lies in the center of their arms. In addition to their eight arms, cuttlefish also have two long tentacles that they can extend to capture prey. Once prey is captured, the tentacles can retract completely into their body. The mantle of the cuttlefish has a pair of flat fins that span the length of the mantle. The reproductive and digestive organs are housed within the mantle, as well as the cuttlebone which is a defining characteristic of this species. The cuttlebone is vitally important for helping the cuttlefish remain buoyant. It is composed of calcium carbonate and has small chambers in it that the cuttlefish can empty or fill with gas to maintain its desired buoyancy (Cuttlefish, 2010).