Martha Holmes / Bowhead whale releasing breathing out underwater {Balaena mysticetus} Arctic

DOC WHITE / Northern elephant seal underwater breathing out at sea surface, off Mexico, Central America

Solvin Zankl / Solvin Zankl, underwater photographer, diving off San Pietro Island, Sardinia, Italy, Mediterranean, July 2010, model release

Tim Laman / Aerial view of {Sonneratia sp} mangrove forest and adjacent mudflat at low tide, Lines of breathing roots are visible protruding from the mud radiating out from the trees. Bako National Park, Sarawak,...

Tim Laman / Aerial view of {Sonneratia sp} mangrove forest and adjacent mudflat at low tide, Lines of breathing roots are visible protruding from the mud radiating out from the trees. Bako National Park, Sarawak,...

Tim Laman / Aerial view of {Sonneratia sp} mangrove forest and adjacent mudflat at low tide, Lines of breathing roots are visible protruding from the mud radiating out from the trees. Bako National Park, Sarawak,...

Tim Laman / Aerial view of {Sonneratia sp} mangrove forest and adjacent mudflat at low tide, Lines of breathing roots are visible protruding from the mud radiating out from the trees. Bako National Park, Sarawak,...

Tim Laman / Aerial view of {Sonneratia sp} mangrove forest and adjacent mudflat at low tide, Lines of breathing roots are visible protruding from the mud radiating out from the trees. Bako National Park, Sarawak,...

Andy Rouse / Galapagos sealion (Zalophus californianus wollebaeki) swimming upside-down underwater, blowing bubbles, Galapagos

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) rises for a breath of air while swimming across shallow reef out to sea from nesting beach, Torres Strait, Queensland, Australia, captive r...

Jose B. Ruiz / Florida box turtle {Terrapene carolina} swimming with head just out of water, Alicante. España.

Pete Oxford / Galapagos sealion (Zalophus wollebaeki) underwater breathing out air bubbles, Gardner Bay, Española (Hood) Island, Galapagos Islands, South America