amphipod

a kind of malacostracan crustacean

• beach flea, sand hopper, sandhopper, sand flea — small amphipod crustaceans that hop like fleas; common on ocean beaches
• skeleton shrimp — small amphipod crustacean having a grotesque form suggestive of the praying mantis; found chiefly on seaweed
• whale louse — amphipod crustacean parasitic on cetaceans

• malacostracan crustacean — a major subclass of crustaceans

• Amphipoda, order Amphipoda — small flat-bodied semi-terrestrial crustaceans: whale lice; sand-hoppers; skeleton shrimp