Mass sea star deaths off US west coast puzzle scientists
Starfish have been mysteriously dying by the millions in recent months along the US west coast, worrying biologists who say the sea creatures are key to the marine ecosystem. Scientists first started noticing the mass deaths in June 2013. Different types of starfish..., were affected, from wild ones along the coast to those in captivity, according to Jonathan Sleeman, director of the US Geological Survey's National Wildlife Health Center.
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