Cleaner fish feed on the parasites that live on other fish. Studying communication between cleaner fish and their clients may help employ them in salmon farms, which can be plagued by parasites.
Fishing boat captains jockey for position near the mouth of the Naknek River, which flows into Bristol Bay.
Luis Sinco/Los Angeles Times via Getty Images
The harvesters of the historic wild salmon run out of Bristol Bay, Alaska, were already facing tough competition from relatively cheap and plentiful farmed salmon. Then came the pandemic.