Jordi Chias / Crabeater seals (Lobodon carcinophaga) resting on ice floating ice sheet, Antarctic Peninsula, Antarctica.

Sven Zacek / Bearded seal (Erignathus barbatus) sunbathing on iceberg broken off from glacier. Kongsfjorden fjord, Spitsbergen, Norway. June 2014.

Danny Green / Sea otter (Enhydra lutris) resting on sea ice, Alaska, USA, June

Danny Green / Sea otter (Enhydra lutris) resting amongst sea ice, Alaska, USA, June

Danny Green / Sea otters (Enhydra lutris) resting on ice, Alaska, USA, June

Erlend Haarberg / Rock face reflected in lake surface with floating blue ice sheets, Ovre Pikhaugvatnet lake, Glomdalen valley, Saltfjellet-Svartisen National Park, Norway, August 2015.

Brent Stephenson / Sunset off Scott Island, with floating pieces of sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August 2015.

Floris van Breugel / Flawless crystalline ice, produced through millennia of glacial pressure, floating on Lago Grey, Torres del Paine National Park, Chile, June 2014.

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) penguins rest on a floating iceberg, Antarctic Peninsula, Antarctica

Floris van Breugel / Natural iridescent oil film from decaying leaves at the surface of a pool, with a cottonwood leaf floating. Escalante National Monument, Utah. November.

Orsolya Haarberg / Glacier ice floating in the Jokulsarlon glacier lagoon, with Fjallsjokull in the background, sunrise, Iceland, September 2010

Orsolya Haarberg / Glacial ice floating in the Jokulsarlon glacier lagoon. Iceland, September 2010