The correct option is 3: a larva of echinodermata The term Ophiopluteus refers to the highly specialized, free-swimming larval stage characteristic of the class Ophiuroidea, commonly known as brittle stars or serpent stars, which are a major group within the Phylum Echinodermata. Echinoderms are well-known for the dramatic shift in symmetry they undergo during their life cycle: the adults are typically five-pointed radially symmetrical (pentamerous), but all of their developmental…Read More