Jack Dykinga / The humpback chubs (Gila cypha) amid Grand Canyon wall reflections in the Colorado River near the confluence with the Little Colorado River. Arizona. Vulnerable species.

Richard Robinson / Beaked drummer fish (Kyphosus pacificus) North Minerva Reef / Teleki Tokelau a disputed territory in the South Pacific between Tonga and Fiji.

Alex Mustard / Brassy chub (Kyphosus vaigiensis) swimming through channel in coral reef at dusk. Alimatha Island, Vavuu Atoll, Maldives. Indian Ocean.

Oriol Alamany / Silver Drummer (Kyphosus sydneyanus) fish off the coast of Neds Beach, Lord Howe island, Lord Howe Island Group UNESCO Natural World Heritage Site, New South Wales, Australia, October 2012.

Claudio Contreras / Yellow chub (Kyphosus incisor) two side by side, Yalku inlet, Caribbean Sea, Mexico, February

Claudio Contreras / Humpback orb-weaver spider (Eustala sp.) in web, Laredo Borderlands, Texas, USA. April

Claudio Contreras / Yellow chub (Kyphosus incisor) blurred motion photograph, Yalku inlet, Caribbean Sea, Mexico, February

Pete Oxford / Cortez chub (Kyphosus elegans) off Wolf Island, Galapagos Islands

Pete Oxford / Cortez Chub (Kyphosus elegans) off Wolf Island, Galapagos Islands, Ecuador, South America

Juergen Freund / Moonlighter fish (Tilodon sexfasciatus) and the artificial coral-reef on pilon beneath the 2km long Busselton Jetty. Busselton, Western Australia

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) large male swimming to the surface amid schooling Dusky Chubs (Girella freminvillei), Cape Douglas, Fernandina Island, Galapagos Islands, Ecuador

Nature Production / Largescale blackfish / Green Fish {Girella punctata} Izu Oshima, Tokyo, Japan