AP BIOLOGY

Detailed explanation-1: -Squid are invertebrates, meaning they lack a true backbone, in the phylum Mollusca, which includes a variety of organisms including clams, snails and limpets. They are in the class Cephalopoda (which translated means “head foot”) along with octopus, cuttlefish and nautilus.

Detailed explanation-2: -Squid are invertebrates in the phylum Molluska, a group that includes snails, clams and chitons. They belong to the Class Cephalopoda (which means head-foot) along with octopus, cuttlefish and nautilus.

Detailed explanation-3: -Squid are a diverse group of invertebrates (animals without backbones). They come in a range of sizes. Some species mature at barely 1 cm, while the largest may grow to a total length approaching 27 m. The largest invertebrate in the world is the giant squid (Architeuthis dux).

Detailed explanation-4: -Squid are members of the class Cephalopoda, subclass Coleoidea. The squid orders Myopsida and Oegopsida are in the superorder Decapodiformes (from the Greek for “ten-legged").