👉 The term "Ophiactoidea" refers to a group of animals that belong to the order Ophiacidae, which includes a wide range of marine and freshwater bivalves, gastropod mollusks, and other aquatic animals. This group is characterized by its large size (up to 250 cm in length), streamlined bodies, and a highly developed exoskeleton that allows them to swim rapidly without the need for fins or shells.
