Yellow Pyramid Butterflyfish - Hemitaurichthys Polylepis - Yellow Pyramid Butterflyfish Is Also Known As The Yellow Zoster Butterflyfish, And Occurs In Large Numbers Among The Reefs Of The Indian Ocean. The Fins Are Yellow In Color, And The Body Is Mostly White. The White Coloration Forms A Triangle With The Yellow Fins, Lending It Its Common Name. The Head Area Is Black Helping These Fish Camouflage Themselves In The Wild. The Pyramid Butterfly Feeds Upon Plankton In The Wild, And Is Safe For Reef Aquariums. Photo