Okinawan blueberry hermit crab, Blueberry hermit crab
Coenobita purpureus, known generally as the Okinawan blueberry hermit crab or blueberry hermit crab, is a species of land hermit crab in the family Coenobitidae.
They typically inhabit and are endemic only along the mainland, oceanic, and continental island coasts of Japan. They are considered to have a very narrow distribution within this northwestern pacific region.