The Coast Guard said in a news release that it received a report of a three-mile-long rainbow sheen off the Louisiana coast just before 9:30 a.m. local time on Saturday. Two subsequent sightings were relayed to the Coast Guard, the last of which reported a sheen that extended from about 6 miles south of Grand Isle, La. to 100 miles offshore.
Though the Coast Guard was able to confirm that there is a substance on the water’s surface, it has not yet been able to determine if it is oil. Wall Street Journal
Bud's Offshore Energy (BOE) 
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