The body shape of the Indian Ocean Blackfish can grow to a maximum of 40cm. Its body tends to be oval, and it is black as a whole. The tail fin has a white vertical band, and the end, dorsal and anal fins have blue edges, just behind the eyes. There is a dark streak.

The Indian Ocean black crab likes to eat seaweed food and inhabits open coral reef areas and rocky reefs In the waters between 1 and 40 meters in depth, they usually live in large groups.