The lined butterflyfish (Chaetodon lineolatus) is a butterflyfish (family Chaetodontidae), one of the largest species in the genus Chaetodon. They have a wide range from the Red Sea to South Africa and as far east as southern Japan and Hawaii. Lined butterflyfish may grow up to 30 cm (nearly 12 in) long, which among Chaetodon is matched only by the saddle butterflyfish (C. ephippium). They are white in color, with thin black vertical bars which join a thick black band at the base of the tail and dorsal fin. The tail, dorsal, and anal fins are yellow.