Tim Fitzharris / Atlantic Sailfish (Istiophorus albicans) and Magnificent Frigatebird (Fregata magnificens) flock hunting Round Sardinella (Sardinella aurita) school, Isla Mujeres, Mexico

Tim Fitzharris / Atlantic Sailfish (Istiophorus albicans) group hunting Round Sardinella (Sardinella aurita) school, Isla Mujeres, Mexico

Tim Fitzharris / Atlantic Sailfish (Istiophorus albicans) pair hunting Round Sardinella (Sardinella aurita) school, Isla Mujeres, Mexico

Gary Bell/ Oceanwide / Porcupinefish (Diodon nicthemerus) in defensive posture, Port Phillip Bay, Mornington Peninsula, Victoria, Australia

Francisco Marquez / Round up of wild mares and foals from marshland to the corrals of the town. Donana National Park, Spain. September 2014.

Gavin Hellier / Aerial shot tracking round the Angel of the North sculpture, Gateshead, Tyne and Wear, Eangland, UK, October 2017. Hellier

Jordi Chias / Round ribbontail ray (Taeniura meyeni) South Ari Atoll, Maldives. Indian Ocean.

Bert Willaert / School of Longfin spadefish (Platax teira), Kimbe Bay, West New Britain, Papua New Guinea

Lucas Bustamante / Red tailed boa constrictor (Boa constrictor constrictor) juvenile, portrait, with tail wrapped round head, Cuayabeno, Sucumbios, Ecuador.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) peering round pine tree, Cairngorms National Park, Highlands, Scotland, UK, April.

Pascal Kobeh / Long-snouted seahorse (Hippocampus guttulatus) with prehensile tail twined round seagrass, Etang de Thau Lagoons, Languedoc-Roussillon, France.

Tim Fitzharris / Atlantic Sailfish (Istiophorus albicans) hunting Round Sardinella (Sardinella aurita) school, Isla Mujeres, Mexico