Black Pyramid Butterflyfish

Hemitaurichthys zoster

The Black Pyramid Butterflyfish, Hemitaurichthys zoster, reaches a maximum length of 18 cm and is notable for its distinctive coloration. It features a black body with a prominent white trapezoid band across the middle, topped with yellow that aligns with the center of the dorsal fin. The fish also has a white tail fin. Its body is laterally compressed, and it has a slightly elongated snout with a small mouth at the end. This species is found throughout the Indian Ocean, from the eastern coast of Africa to regions such as India and Java, Indonesia. It thrives in large groups along the slopes of outer reefs and occasionally ventures into open waters to feed. Typically, the Black Pyramid Butterflyfish is seen at depths ranging from 3 to 40 meters, although it can be found deeper. The diet of the Black Pyramid Butterflyfish mainly consists of plankton, and it also feeds on algae above the reef. During the breeding season, these fish form pairs. While it appears in the aquarium trade, it is not commonly found there. The IUCN has classified this species as Least Concern.