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Project Noah Nature School
Heloecius cordiformis
Adults are around 25 mm (1 in) wide, with males being larger and having larger and more conspicuously coloured claws. The males wave their claws to communicate with other crabs, giving them their common name of semaphore crab. They can breathe both in air and under water, and feed at low tide on detritus in the sediment. H. cordiformis is the only species in the genus Heloecius and the family Heloeciidae.
Mangrove sand/mudflat.
Spotted on Aug 19, 2013
Submitted on Aug 19, 2013
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