Solving the Case of the Mystery Sheen
In early March 2017, a U.S. Coast Guard helicopter was returning to its home base when the aircrew spotted a silvery sheen in the water about 35 miles west of San Diego, California.
![Two people on a boat grabbing a sample of oil in water.](https://response.restoration.noaa.gov/sites/default/files/usgssamplingsdseep.jpg)
Last updated
Tuesday, January 3, 2023 3:14pm PST