Largest of the Butterflyfish. There are others with vertical lines, but this one has a single black bar across the eye, and another which extends from the top of the back to, and including, the base of the tail (caudal peduncle).
Largest of the Butterflyfish. There are others with vertical lines, but this one has a single black bar across the eye, and another which extends from the top of the back to, and including, the base of the tail (caudal peduncle).
