rockpool shrimp (palaemon elegans), crustacean underwater

animal aquatic arthropoda arthropods biology black sea fauna cancer caridea claws crab crawfish crayfish crustacea crustacean crustaceans decapoda ecological elegans exoskeleton hydrobiology invertebrate macro malacostraca marine marines nature palaemon adspersus palaemonidae pleocyemata prawn reptantia rockpool shrimp saltwater undersea underwater water world wild wildlife