fiddler crab raising his pinchers

animal anthropod asymmetric brackish calling chela claw combat courtship crab defend dishonest ebb fiddler fish flat flow freshwater funny ghost guarding heap hill his king lagoon major male mangrove marsh minor mountain mud natural nature ocypode ocypodidae one oversized pet pinchers raising ritualised salt sand scizzor sea signaling small tides uca war water waving wild wildlife