Dungeness crabs for sale at Fisherman's Wharf in San Francisco. California's Dungeness crab season was shut down in 2015, when record high ocean temperatures and lingering toxic algae blooms raised the domoic acid in shellfish to unsafe levels. A new study links dangerously high levels of the neurotoxin to warmer ocean temperatures, suggesting such closures could become more common in the future.
![Warming Oceans Could Boost Dangerous Toxin In Your Shellfish Dinner](https://cdn-ak-scissors.b.st-hatena.com/image/square/453b24bce70b48d67c24083c6b83377bc47359e3/height=288;version=1;width=512/https%3A%2F%2Fmedia.npr.org%2Fassets%2Fimg%2F2017%2F01%2F09%2Fap_286343091944_wide-f73c5f8e03987f64a6e38948ceb70bea4408e531.jpg%3Fs%3D1400%26c%3D100%26f%3Djpeg)