Cuttlefish are apart of the Cephalopoda family, which are also closely related to squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone. The cuttlebone is hard. It is an internal structure found in all members of the family Sepiidae. The Sepiidae is a family within the cephalopods. Some random facts; there are 120 species of cuttlefish, female cuttlefish can store multiple sperm packets, then select one for fertilizing, and cuttlefish can manually control their buoyancy.

Another trait that the cuttlefish has is the ability to change color. These Cephalopoda have a unique cell that allows it to change skin pigment. This phenomenon is caused by chromatophores. Over 500 million years they have learned and master to adapt to their environments. They are able to change pigment within 300 milliseconds, which is a three-tenths of a second. Cuttlefish have used this trait to help them defend themselves from other predators. These predators consist of fish, dolphins, seals, sharks, seabirds, and other cuttlefish.

sources: Google, Wikipedia, and mentalfloss

Featured image: Google