Chelmonops is a small genus of butterflyfishes, containing just 2 species. Unlike the mainly tropical distribution of most marine butterflyfishes, Chelmonops species are restricted to temperate and subtropical coastal waters along the southern half of Australia. They are not frequently seen in the marine ornamental trade. The name of the genus is a compound of the name Chelmon coined by Georges Cuvier (the genus that C. truncatus was originally placed in), and the word ops which means “resembles”. Click or touch a thumbnail image for species level information.