A microscopic killer lives in SF’s waters

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Outside the Golden Gate Bridge, in California’s coastal waters, lives a killer much smaller than the Great White shark.

A certain microscopic algae, termed Pseudo-nitzschia diatoms, generate a neurotoxin called domoic acid. These diatoms bloom naturally during the spring and summer and can poison marine life and humans that consume contaminated fish and shellfish. While blooms typically disappear by fall, a massive one persisted much longer in 2015 and was responsible for the closure of California’s Dungeness crab season.

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