Triangulate Butterflyfish

The Triangulate Butterflyfish is a beautiful Indian Ocean species distinguished by its striking pattern of dark chevron or herringbone markings arranged in a triangular configuration across its pale body. A dark band passes through the eye, and the posterior portion of the body transitions to a rich dark brown or black, creating a bold and distinctive two-toned appearance. The dorsal and caudal fins are accented with yellow and orange, adding warmth to the overall color scheme.

This species is found on coral-rich reefs throughout the Indian Ocean, where it feeds primarily on soft coral polyps and small benthic invertebrates. Its strong dependence on coral as a food source makes it challenging to transition to captive diets and categorically not reef-safe. Patient aquarists who can offer fresh coral-based foods during acclimation and gradually transition to frozen preparations will have the best success.

The Triangulate Butterflyfish requires intermediate care with attention to water quality and dietary needs. It is peaceful toward other fish and does well in fish-only aquariums alongside other non-aggressive species. Its limited geographic range in the Indian Ocean means it is less commonly available than many Indo-Pacific butterflyfish, adding to its appeal for collectors seeking unusual species. A well-maintained FOWLR system with stable parameters provides the best environment for long-term success.