Roland Seitre / Risso's dolphin (Grampus griseus) spyhopping. The Azores.

Erlend Haarberg / Common / Harbour seals (Phoca vitulina) on ice, Iceland, April

Erlend Haarberg / Atlantic puffin (Fratercula arctica) portrait, Iceland, July

Erlend Haarberg / Killer whale / Orca (Orcinus orca) surfacing, Latrabjerg, Iceland, July

Erlend Haarberg / Common / Harbour seal (Phoca vitulina) swimming with head above water, Iceland, June

Erlend Haarberg / Common / Harbour seal (Phoca vitulina) swimming with head above water, Iceland, June

Alex Mustard / Hairy / striated / striped frogfish (Antennarius striatus) laying an ambush amongst weeds in shallow water, West Palm Beach, Gulf Stream, tropical West Atlantic Ocean, Florida, USA.

Alex Mustard / Hairy / striated / striped frogfish (Antennarius striatus) fishes with it's lure (illicium) while it remains camouflaged on the seabed, West Palm Beach, Gulf Stream, West Atlantic Ocean, Florida, USA.

Alex Mustard / Goliath grouper (Epinephelus itajara) on a rich coral reef with a diver swimming alongside, Bloody Bay Wall, Little Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Diver tickling Nassau grouper (Epinephelus striatus) Bloody Bay Wall, Little Cayman, Cayman Islands. British West Indies, Caribbean Sea. Model released.

Alex Mustard / Smooth trunkfish (Lactophrys triqueter) portrait, above the reef during the day, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Slender filefish (Monacanthus tuckeri) sheltering amongst gorgonian branches, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.