These pictures of marine animals in their natural habitats celebrate sea-life from around the world, while reminding people what is at stake from ocean pollution.
One of the photographers, David Doubilet, explained: "As photographers we are all on the front lines of a war to protect our oceans for future generations."
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Bite-Back, a British marine conservation organisation, is releasing the photography as its 2012 charity calendar. They hope to halt the consumption of vulnerable fish species, promote sustainable fishing, and protect ocean habitats.
The calendar can be bought from www.bite-back.com for £7.99