Many crustaceans (a broad crustacean group) [Multicrustacea]

Description

Underwater, this category covers a wide range of crustaceans that divers may encounter as moving, jointed animals—think crabs, shrimp, and other familiar forms. You might spot them hiding in holes, cleaning on reefs, or scuttling across the seafloor, often with quick, twitchy movements.

Families

Barnacles

Thecostraca

Taxonomy