Heterozius rotundifrons
Crab, Big Handed
Invertebrate
Arthropoda
Malacostraca
Belliidae
Carapace is yellow-green in colour. The male crab has a greatly enlarged right claw.
Found in small groups under cobble.
They are scavengers feeding on dead animals and plants.
If disturbed it will freeze with its legs tightly folded and will remain so for some time.
Collins: Gunson