The knobsnout parrotfish (Scarus ovifrons) is a species of parrotfish famous for its characteristic blue color. It lives in reefs and coral reefs. It grows to a maximum length of about 90 cm. Its body is a strong blue color, and may have reddish-brown, white, or black spots on it. Adult fish have whitish spots on their cheeks and a lump on their foreheads. Young fish have no spots on their cheeks or lumps on their foreheads.