Oliver Wright / Four-spotted chaser (Libellula quadrimaculata) resting on stem, covered in early morning dew. Skipwith Common National Nature Reserve, North Yorkshire, England, UK. May. Focus stacked image.

Alex Mustard / Yellow tube sponge (Aplysina fistularis) on coral reef, diver exploring in background. Black Rock Drop Off, East End, Grand Cayman, Cayman Islands, British West Indies. Model released.

Pascal Kobeh / Trumpetfish (Aulostomus chinensis) on the coral drop off, Sulu Sea, Philippines.

Alex Mustard / California sea lion (Zalophus californianus) uses a Panamic cushion star (Pentaceraster cumingi) as a toy. The sealions pick up the starfish and then drop them and chase after them as they sink. Los I...

Steve Downer / Newly hatched slug (Gastropoda) approaching a water droplet on a leaf before bursting it and retracting its eyestalks, Birmingham, England, UK. Controlled conditions.

Pete Oxford / Kaieteur Falls is the world's widest single drop waterfall, located on the Potaro river in the Kaieteur National Park, in Essequibo, Guyana, South America

Alex Mustard / Nassau grouper (Epinephelus striatus) yawning on a coral reef drop off. San Salvador island, Bahamas. Bahamas Sea, Tropical West Atlantic Ocean.

Lucas Bustamante / Sarayacu clownfrog (Dendropsophus sarayacuensis) with its clutch of eggs developing and starting to drop off from a leaf into the water below, where the tadpoles will develop. Sumaco National Park, N...

Alex Mustard / Hawksbill turtle (Eretmochelys imbricata) cruising along the drop off of a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands. Caribbean Sea. NB. Turtle has two identification tags in its fron...

Andy Rouse / Mute Swan (Cygnus olor) courtship behaviour, Wales, UK, April.

Pete Oxford / Galapagos fur seal (Arctocephalus galapagoensis) near coral reef drop off, Galapagos, December.

Markus Varesvuo / Black-throated diver (Gavia arctica) on water, Finland, May.