Question

multiple choice question
the largest known invertebrate is the colossal squid, a member of what mollusk class?
crustaceans
cephalopods
marine flatworms
gastropods

Explanation:

Cephalopods are a class within the mollusk phylum. Colossal squid belong to this class. Crustaceans are arthropods (not mollusks). Marine flatworms are platyhelminthes (not mollusks). Gastropods (like snails) are a different mollusk class from cephalopods.

Answer:

cephalopods