👉 The Crassatelloidea is a group of marine gastropod mollusks in the family Crematoglossidae, which includes crabs and snails. They are characterized by their long, slender bodies with short arms, a large head, and a narrow mouth. Crassatelloidea mollusks are known for their ability to grow rapidly due to their elongated body structure, making them ideal for feeding on small prey like crustaceans or other animals.