Neohelice granulata sitting on rock in intertidal zone

neohelice granulata exoskeleton crustacean intertidal zone marine environment estuary chasmagnathus granulata biology ecological research euryhalinity scientific studies burrowing semiterrestrial crab salt marsh ecology physiology highly studied species emergent animal model marsh creature biochemical research crustacea malacostraca decapoda brachyura varunidae wildlife filter feeder model species in biological fields semiterrestrial habit pincers nature mudflats decapod crustaceans thorax chitin pair of chelae claws animal creature legs outside outdoors eyestalk crab outline beach rock time lapse rocky perch rising tide tide ocean