Tony Wu / Humphead parrotfish (Bolbometopon muricatum) shoal spawning in early morning, part of mass aggregation of thousands of fish. Caroline Islands, Palau.

David Fleetham / Bumphead parrotfish (Bolbometopon muricatum), Yap, Micronesia.

Alex Mustard / Bumphead parrotfish (Bolbometopon muricatum) gather at dawn on a shallow coral reef. Sipadan Island, Sabah, Borneo, Malaysia. Celebes Sea. Vulnerable species.

Juergen Freund / Bumphead parrotfish (Bolbometopon muricatum) shoal. Sipadan Island, Sabah, Borneo.

Pascal Kobeh / Group of Humphead parrotfish (Bolbometopon muricatum) swimming above coral reef, Sudan. Red Sea.

Pascal Kobeh / Two Humphead parrotfish (Bolbometopon muricatum) swimming on above coral reef, Sudan. Red Sea.

Pascal Kobeh / Humphead parrotfish (Bolbometopon muricatum) above coral reef, cleaned by two Blue streaked cleaner wrasses (Labroides dimidiatus) among Jewel fairy basslets / anthias (Pseudanthias squamipinnis) Suda...

Pascal Kobeh / Humphead parrotfish (Bolbometopon muricatum) swimming in open water, Sudan. Red Sea.

Pascal Kobeh / Group of Humphead parrotfish (Bolbometopon muricatum) swimming by coral drop off with divers in the background, Sudan. Red Sea. June 2013.

Lucas Bustamante / Bumphead parrotfish (Bolbometopon muricatum) and King angelfish (Holacanthus passer) swimming over reef, Gordon Rocks, Galapagos National Park, Pacific Ocean.

David Fleetham / Bumphead parrotfish (Bolbometopon muricatum) grinding coral / feeding off Sipadan Island, Malaysia, Celebes Sea, Pacific Ocean.

Henley Spiers / Humphead parrotfish (Bolbometopon muricatum) showing breeding colouration, spawning in the early morning, Palau, Micronesia, Pacific Ocean.