Giant Damselfish

Least concern.
Categories and criteria of the IUCN Red List:

It defends its feeding and breeding territory by driving away fish and scuba divers that get too close.

Its eggs adhere to the substrate, where males protect and aerate them until the offspring are born.

Its body is thick and flat, of a dark greyish-blue or black color. It grows up to 12 inches.

It feeds on algae, bristle worms, crustaceans and parasites.