David Fleetham / Great white shark (Carcharodon carcharias) dorsal fin visible on surface. Guadalupe Island, Mexico.

Tony Wu / Indo-Pacific sailfish (Istiophorus platypterus) in feeding frenzy, with the remains of a previously large school of sardines (Sardina sp) in background. Isla Mujeres, Cancun, Mexico.

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

SCOTLAND: The Big Picture / Pod of Bottlenose dolphins (Tursiops truncatus) surfacing just offshore, Black Isle, Scotland, UK, July.

Ingo Arndt / Close up of fin of Loggerhead turtle {Caretta caretta}

Espen Bergersen / Killer whale / Orca (Orcinus orca) male surfacing at sunset, Kvaloya, Troms, Norway October

Tony Wu / Humpback whale (Megaptera novaeangliae) female with calf, pursued by males during heat run. Vava'u, Kingdom of Tonga. Pacific Ocean.

Jordi Chias / Split level view of Blue shark (Prionace glauca) at surface at sunset, Azores Islands, Portugal, Atlantic Ocean

Wild Wonders of Europe / Widstrand / Dorsal fin of Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fis...

Brent Stephenson / Type B Killer whale (Orca orcinus) surfacing, close-up, Antarctic Sound, Antarctic Peninsula, Antarctic, January.