noun
red-clawed crab; Chiromantes haematocheir
A species of crab with distinctive red claws, found in coastal areas of Japan and East Asia.
干潟でアカテガニを見つけた。
I found a red-clawed crab on the tidal flat.
The name アカテガニ literally means 'red-hand crab', from 赤 (red) + 手 (hand) + 蟹 (crab). The exact derivation is straightforward.