Suzi Eszterhas / Harbor Seal (Phoca vitulina) group on ice floes, Prince William Sound, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) pair in icy water, Prince William Sound, Alaska

Hiroya Minakuchi / Orca (Orcinus orca) pod surfacing, Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris), Prince William Sound, Alaska

Donald M. Jones / Sea Otter (Enhydra lutris) mother and pup, Prince William Sound, Alaska

Chris & Monique Fallows / Orca male (Orcinus orca) raising pectoral flipper out of the water, Prince William Sound, Alaska, USA.

Chris & Monique Fallows / Pink Salmon (Oncorhynchus gorbuscha) migrating in small shallow river, Prince William Sound, Alaska, USA.

Steven Kazlowski / Trans-Alaskan Pipeline, with blooming fall tundra colours, that runs from Prudhoe Bay on the Arctic coast to Valdez at the north central coast of Prince William Sound, Alaska, USA

Doug Perrine / Swarm / aggregation of venomous Moon jellyfish (Aurelia aurita) Port Fidalgo, Prince William Sound, USA, July

Doug Perrine / Salmon shark (Lamna ditropis) female with mating scars and copepod parasites trailing from fins, Port Fidalgo, Prince William Sound, Alaska, USA. Digital composite

Doug Perrine / Salmon shark (Lamna ditropis) female with mating scar on side and copepod parasites streaming from fins, Port Fidalgo, Prince William Sound, Alaska, USA

Doug Perrine / Salmon shark (Lamna ditropis) Port Fidalgo, Prince William Sound, Alaska, USA