Cuttlefish can bite. The mouth of the cuttlefish has a sturdy beak like structure that helps to bite its prey. It eats shrimp, crabs and other small cuttlefish. It lives in coastal waters. It has ten tentacles. The two longer tentacles are useful in catching the prey faster. It uses its denticulate suckers to safeguard its prey from other species. Though it has sharp beaks, there is no report that it has bitten any swimmers.