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The researchers found that as the kelp was damaged or destroyed, fewer zooplankton, and in particular the tiny mysid shrimp that make up a big portion of the gray whale's diet, remained in the near-shore waters.

In 2019, the biologists finally arrived at the optimal formula of mysid shrimp, water fleas and blood worms.

For the estuary ecosystem, the scientists studied Inland Silverside and mysid shrimp, while in the freshwater ecosystem the scientists studied embryonic zebrafish and the crustacean Daphnia magna.

Environmental Protection Agency had concluded in a June 2010 report that Corexit 9500A was "slightly toxic" to mysid shrimp found in the Gulf of Mexico.

It took about 7 days, however, for the air-dried nets to reach comparable mortality rates, and in the control group, where the nets remained damp, all the species except for the bloody red mysid survived for a little more than 2 weeks.