 the snout has a dark line from each eye to the nostrils.Juveniles and breeding adults develop 12 or 13 rather even vertical bands along their sides while losing the wavy lines and X shaped markings as the scales of the upper sides become quite dark with pale tips on the pectoral and pelvic fins.The unpigmented areas of the second dorsal, anal, and caudal fins stand out so that the fin has the appearance of having white bands on a dark background, which is a reversal of the appearance in non-breeding adults.