Somanniathelphusa zanklon

It prefers living in slow moving streams or lowland marshes, was originally described from specimens from the lower Lam Tsuen River and the So Kwun Wat area of Hong Kong. Studies have shown that is tolerant to organic pollution, and can be found in irrigation ditches around the New Territories.

The lifecycle of S. zanklon is similar to most true freshwater crabs, in which they brood over planktonic larvae, and release their juveniles at the onset of the rainy season. It is naturally omnivorous, with records of it eating seeds of the Bauhinia variegata tree, as well as various species of freshwater snails. It is preyed upon by both native wild carp, as well as invasive goldfish and tilapia, which have been introduced to their environment through human intervention.