Last one in's a walrus! A line of penguins plunge into the freezing water to join others from their group as they hunt through a crack in the sea ice
He shot the set over four trips to the Antarctic, all prior to 2009, which have just been turned into a new book called 'The Last Ocean: Saving the Most Pristine Ecosystem on Earth.'
The project, which included shots of Emperor and Adelie penguins, silverfish, seals, and minke whales, was supported as one of the Pew Research Center's Environmental Initiatives.
Prior to his voyages, John helped set up the Last Ocean Organisation in 2004, joining scientists and environmental groups in a campaign to have the entire Ross Sea designated as an international marine protected area - it is yet to be declared so.
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