Trouble in the tide pools: Rapid die-off of sea stars and urchins foretells long-term change

In August 2011, scientists at the UC Davis Bodega Marine Laboratory walked into their labs to a strange, disturbing sight: Thousands of purple sea urchins and other marine invertebrates were dead in their tanks, which are fed directly by seawater. Outside, the tea-colored ocean washed up carcasses of red abalone, large sea stars, and football-sized, snail-like chitons.

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Trouble in the tide pools: Rapid die-off of sea stars and urchins foretells long-term change