Hanauma Bay, Oahu, 40 feet

Postlarvae, Midway Atoll, from Tuna stomach

Oceanarium, Pacific Beach Hotel, Waikiki

Black Rock, Maui, 10 feet

Juvenile at night, Makapu'u tidepool, Oahu

Kapoho tidepool, Hawaii

Juvenile, Sharks Cove, Oahu, 20 feet

Common in shallow water where it feeds upon algae.  Attains 30 inches.  Adults with a horn situated just above the eyes.  Olive green, it can display an iridescent blue splash at will.  Red Sea to Okinawa, Hawaii, and French Polynesia.