crab burrow of Nanhaipotamon guangdongense

Description:

All members of the freshwater crab genus Nanhaipotamon live semiterrestically in self-digged burrows at the banks of small streams and rivers. Sometimes, their burrows are directely connected to the neighboring stream or ground water. These burrows are really deep and without proper equipment it is often impossible to dig the crabs out. Because they do not go away far from their burrows and will always flee and hide there when disturbed, it is really hard to catch them at all.