Orangutan Crab – Achaeus japonicus
“orangutan” comes from the Malay words “orang” (man) and “(h)utan” (forest).  Hence, “man of the forest,” and these crabs really seem to look like their Terra-based namesakes. Not only do they resemble Orang-utans with their hair, but they also seem to sway their front legs from side to side in a very good imitation of an this great ape!!
It is frequently, but not always, found in association with the bubble coral Plerogyra sinuosa

Etymology:
japonicus – Latin, literally ‘Japanese’
The Achaeus – Greek  – Ἀχαιοί, were one of the four major tribes into which the people of Classical Greece divided themselves (along with the Aeolians, Ionians and Dorians)