Pyramid butterfly these are usually spotted off walls and ledges over deeper water in schools which is a little different from most butterfly that normally are coupled up.
Very easy to spot these fish with the distinctive pyramid shape on the side of the fish. They also have a black noses that are sometimes more brown in color as they get older notably no false eyes on the back of the fish which is a common feature on many of the butterfly fish.
They also like to swim with other fish in big mixed schools. You can find them many times 10 meters off the walls and ledges again with deep water underneath them.