"Wilkin says the NOAA is working with fishery scientists and oceanographers to pinpoint the exact cause. Besides food shortages, they are also exploring other theories including exposure to biotoxins, disease and human pollutants. They are even looking into possible radiation contamination from Japan's Fukushima nuclear power plant meltdown following the 2011 tsunami.
But regardless the reason, Wilkin said this could be a sign of something more troubling in the waters off the coast of California.
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