Alex Mustard / Male Speckled sandperch (Parapercis hexophthalma) hunting for invertebrate food on the sand next to coral reef. Small Crack, Sha'ab Mahmud, Sinai, Egypt. Red Sea.

Alex Mustard / Black grouper (Mycteroperca bonaci) hovering above a Bahamian coral reef, Little Bahama Bank, The Bahamas, Caribbean Sea.

GEORGETTE DOUWMA / Spinecheek anemonefish (Premnas biaculeatus) amongst tentacles of its exclusive host, the Bubble tip anemone (Entacmaea quadricolor) Raja Ampat, West Papua, Indonesia.

David Hall / Caribbean trumpetfish in coral. (Aulostomus maculatus) Cayman Is

Peter Scoones / Blackbar Soldierfish group (Myripristis jacobus) Bonaire, Netherlands Antilles, Caribbean photographed during making of BBC Planet Earth series 2005

Juergen Freund / Potato grouper (Epinephelus tukula), Rowley Shoals, Western Australia

Georgette Douwma / Clown anemonefish (Amphiprion percula) amongst tentacles of a blue variety of anemone (Stichodactyla gigantea) Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Shoal of pygmy sweepers (Parapriacanthus ransonetti), Andaman Sea, Thailand

Franco Banfi / Reef under the surface of shallow waters, at sunset, covered with hard corals, Brush Coral (Acropora hyacinthus) Robust Acropora (Acropora robusta) and other Acropora, Maldives, Indian Ocean

Alex Mustard / Portrait of Masked butterflyfish (Chaetodon semilarvatus), swimming next to coral reef. Endemic to Red Sea. Malahi, Fury Shoal, Egypt.

Georgette Douwma / Pygmy sweepers (Parapriacanthus ransonneti) with soft corals (Dendronephthya sp) Egypt, Red Sea.

Michael Pitts / Spotted moray eels {Gymnothorax moringua} amongst soft coral