Peter Scoones / Red bellied piranha (Serrasalmus / Pygocentrus nattereri) pantanal wetlands, Brazil. photographed during making of BBC Planet Earth series 2005

Konrad Wothe / Sockeye salmon (Onocorhynchus nerka) being held by man, Alaksa, USA, July

John Cancalosi / Fossilised fish

John Cancalosi / Fossilised fish

John Cancalosi / Fossilised fish

Juergen Freund / Olive brown seasnake {Aipysurus laevis} swimming underwater amongst fish, Indo-pacific

Juergen Freund / Potato grouper / cod (Epinephelus tukula) Indo-pacific

Juergen Freund / Schooling Slate sweetlips {Diagramma labiosum} Indo-pacific

Shattil & Rozinski / Largemouth bass {Micropterus salmoides} USA

Juergen Freund / Longnose hawkfish {Oxychirrhites typus} Indo-pacific

Juergen Freund / Longnose Hawkfish {Oxycirrhites typus} Underwater Indo-Pacific

Juergen Freund / Decorated dartfish {Nemateleotris decora} Indo-Pacific