Group of male fiddler crabs, austruca annulipes waving their asymmetric claws, performing courtship dance around their burrow during low tide period, close up shot of marine wildlife

ring legged fiddler crab austruca annulipes wildlife animal ecosystem calling beach sand male claw uca mangrove porcelain shore wetland ball species habitat crustacean tidal coastal asymmetric vocans gelasimus flat sandflat dominant low tide courtship mating season wave display dance drumming marine breed behaviour malaysia indonesia thailand singapore natural nature burrow