Shane Gross / Moorish idol (Zanclus cornutus) juvenile with transparent skin in the open ocean at night off Anilao, Philippines.

Juergen Freund / Moorish Idol fish {Zanculs cornutus} Indo-Pacific

Alex Mustard / Reef fish, including Mexican hogfish (Bodianus diplotaenia) and moorish idol (Zanclus cornutus). Wolf Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

Claudio Contreras / Moorish Idol (Zanclus cornutus), Roca Partida islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, We...

Claudio Contreras / Moorish Idol (Zanclus cornutus), Roca Partida islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, We...

Pascal Kobeh / Diver above a coral reef with Table corals (Acropora) and Moorish idol (Zanclus cornutus) Mayotte. Indian Ocean. February 2010.

Georgette Douwma / A dead Moorish Idol, (Zanclus cornutus) lying on coral reef, part of mass die off in the Maldives, cause unknown, Maldives.

Norbert Wu / Royal Angelfish (Pygoplites diacanthus), Moorish Idol (Zanclus cornutus), and Parrotfish (Scaridae) school in coral reef, Bali, Indonesia

Georgette Douwma / Group of three Moorish idol (Zanclus cornutus) swimming past coral wall. Rinca, Indonesia.

Georgette Douwma / Moorish idol (Zanclus cornutus) swimming past coral wall, Rinca, Indonesia

Michael Pitts / Moorish idol in wreck {Zanclus cornutus} Truk lagoon, Micronesia Pacific

GEORGETTE DOUWMA / Moorish idol {Zanclus cornutus} swimming past coral reef wall, Bunaken, North Sulawesi, Indonesia.