bannerfish

Noun

 * 1) A large sailfish of the species, of the swordfish family, with a broad banner-like dorsal fin
 * 2) Any of several species of butterflyfish in the genus  (order ) that superficially resemble the Moorish idol (, order ), though not closely related.
 * 1) Any of several species of butterflyfish in the genus  (order ) that superficially resemble the Moorish idol (, order ), though not closely related.