Solvin Zankl / Baby Olive Ridley sea turtle (Lepidochelys olivacea) struggles against the swell to swim away from the beach where it hatched, Ostional, Costa Rica. October. Winner of the Underwater category of the G...

Floris van Breugel / Alkali fly (Ephydra hians) underwater in protective air bubble, Mono Lake, California, USA.

Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.

Theo Bosboom / Beech trees (Fagus sylvatica) in autumn, seen from under bubbling brook, the Netherlands, November. Runner up in Creative Visions category of the Wildlife Photographer of the Year 2013 competition

Graham Eaton / Leatherback Turtle Hatchling (Dermochelys coriacea) crossing a beach towards the sea at sunrise, Cayenne, French Guiana, July

Graham Eaton / Jurassic ammonite on a beach, with the Jurassic Bridport Sandstone cliffs in the background, Jurassic Coast, Burton Bradstock, Dorset, March 2012

Graham Eaton,Graham Eaton / Bottlenose Dolphin (Tursiops truncatus) splashing water as it surfaces, Cardigan Bay, Wales, May

Michel Roggo / Atlantic Salmon (Salmo salar) male, captive in fish-farm. France.

Erlend Haarberg / Air bubbles frozen in ice, Helgeland, Nordland, Norway, November

Alex Mustard / Diver blowing bubble rings, while resting on the sand, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea, January 2011.

Graham Eaton / Underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Underwater view of a mountain lake with frozen surface, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December