A group (class) of marine molluscs that includes nautiloids, squids, octopuses, cuttlefish, and the extinct ammonoids and belemnites

Having a distinct head with a beak and muscular tentacles that usually have suckers on them.

a class of marine molluscs which includes the octopus, squid, and cuttlefish.

a marine invertebrate characterized by a head surrounded by tentacles.