Common name : slipper snails, cup-and-saucer snails, or Chinese hat snails

Aspect : often thin, oval, and dome-shaped, resembling limpets, slightly coiled, with a small spire (apex); the spire of the body dominates the overall structure; the distinctive feature is the internal structure in the shape of a plate, cup, or half-cup; the genus Crepidula has a blade inside the shell that half-closes the opening and protects the animal's body

Feeding : use both filtration (planktonic particles, tiny debris, bacteria, and microalgae) and ingestion of organic deposits

Environment : inhabit marine environments worldwide, from tropical to temperate waters, typically in the intertidal (littoral) to shallow sublittoral zones (up to 70 m depth); prefer sheltered, wave-protected areas such as bays, estuaries, rocky shores, and muddy or silty bottoms