Copperband butterflyfish (public domain)
Butterflyfish (Chaetodontidae) typically have colorful, highly compressed bodies with dark bands running across their eyes. Many species have eyespots on the rearmost part of their flanks. Their tail fins are never forked. In contrast to angelfish, butterflyfish do not have spines on their gill covers. Butterflyfish can reach 24 centimeters (9.4 inches, dotted butterflyfish) in length.