Pacific bun hornsmainly fronds, succulents, and zooplankton as Food. Living in the coral reef waters of the Western Indian Ocean, they usually live alone or in small groups. Generally, Pacific bun horns prefer to live in small groups.

The Pacific bunion is gray-brown on the whole, with a grayish-yellow abdomen part, and a tumor-like protrusion on the back with large tracts Spots and blotches, bright blue-edged dorsal fin, black-edged pectoral and caudal fins.