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"Algae can contaminate vast areas in the sea with highly neurotoxic substances, killing thousands of fish and other marine life. Meanwhile, humans can also become dangerously ill as a result of eating the poisonous seafood. From California's 'red tide', where tons of dead fish are washed ashore every year, to Stockholm, where a group of scientists are recording how algae are killing the Baltic Sea, this in-depth documentary travels the world to uncover the startling instances of oceanic catastrophe, and the steps scientists are making to prevent them."--Container.