empty shutters of the sessile crustacean balanus sp

acorn animal arthropoda arthropods balanidae balanoidea balanus barnacle benthos bentos black sea cancer close closeup crab crawfish crayfish crustacea crustacean crustaceans decapoda ecological ecology environment fauna flora invading invasion invasive invertebrate invertebrates life malacostraca marine mollusk mussel nature saltwater sessile organisms shell shellfish underwater footage water world wildlife