What is the Difference Between a Squid, Cuttlefish, and Octopus, and How do you Tell the Cephalopods Apart?
Squids, Cuttlefish and Octopuses are mollusks that belong to the cephalopod group of invertebrates, meaning they have eight legs. Squid have a hard inner-body shell called a pen, instead of an outer one like clams and snails. The octopus, in contrast, has no shell at all. Its outer mantle, or skin, is thick and tough, […]