Scarus perrico reaches 75 cm. Large Eastern Pacific parrotfish. Terminal males with characteristic massive forehead hump (melon), green-blue to gray-green body with pink-purple snout, electric blue lines on head. Females brown-beige mottled, more discreet. Protogynous hermaphrodite. Lives in schools from 3 to 30 m on rocky reefs from Gulf of California to Peru, Galapagos. Herbivore grazing algae and soft corals. Significant bioerosion of rocky reefs. Wide-angle photo subject for dominant males with impressive melon.

