Tim Laman / Split level of Brain coral growing around the underwater portions of Red mangrove roots {Rhizophora mangle} on offshore mangrove island, Tunicate Cove, Belize.

Steven Kazlowski / Bowhead whale (Balaena mysticetus) swimming amidst multi-layer ice (freshwater pans formed over many years where the salt is squeezed out of the ice) offshore from Point Barrow. Chukchi Sea, Arctic Al...

Tui De Roy / King Penguin (Aptenodytes patagonicus) group swimming underwater offshore from breeding colony, Macquarie Island, sub-Antarctica Australia

Tui De Roy / King Penguin (Aptenodytes patagonicus) group underwater, offshore from breeding colony, Macquarie Island, sub-Antarctica Australia

Tui De Roy / King Penguin (Aptenodytes patagonicus) group swimming underwater offshore from breeding colony, Macquarie Island, sub-Antarctica Australia

Tui De Roy / King Penguin (Aptenodytes patagonicus) group swimming underwater offshore from breeding colony, Macquarie Island, sub-Antarctica Australia

David Woodfall / Dawn over offshore wind turbine farm, Essex, England, UK, December.

David Woodfall / Dawn over offshore wind turbine farm, Essex, England, UK, December.

David Woodfall / Sunrise over offshore wind turbine farm, Essex, England, UK, December.

Gabriel Rojo / Aerial shot of Orcas (Orcinus orca) hunting offshore, stunning fish with tail, Peninsula Valdez, Patagonia Argentina

Ashley Cooper / Methane, extracted from an old landfill site on Walney Island, to power a biogas generator producing green electricity, Cumbria, UK, with the Ormonde offshore wind farm in the background. February 201...

Ashley Cooper / Methane, extracted from an old landfill site on Walney Island, to power a biogas generator producing green electricity, Cumbria, UK, with the Ormonde offshore wind farm in the background. February 201...