Description

Orisarma sinense is a semiterrestrial sesarmid crab found in East Asia, particularly China and Hong Kong. It occupies mangrove and mudflat habitats, is comparatively small, brightly colored, and exhibits fascinating nocturnal arboreal behavior.

Distribution & Habitat:

This crab is native to coastal regions of East Asia, with confirmed occurrences in China and Hong Kong, and potentially across broader East Asia.

It thrives in intertidal and semiterrestrial environments, such as mangrove swamps and mudflats, where it seamlessly transitions between land and water.

Features & Behavior:

• Size & Morphology: Adult carapace width usually ranges between ~19 mm and 30 mm.

• Appearance: In life, the carapace and claws are typically pale to bright red, and the crab possesses a relatively convex and slightly smoother dorsal surface.

• Behavior: Observations indicate tree-climbing behavior at night, suggesting foraging on elevated structures—behavior noted in related sesarmid crabs.