The National Oceanographic and Atmospheric Administration expanded the area by 5 percent Tuesday.
NOAA says as of 6 p.m. EDT Tuesday that nearly 76,000 square miles would be off-limits because of oil spreading from the Deepwater Horizon disaster. That's more than 31 percent of federal Gulf waters.
The irregular shape ban extends from Atchafalaya Bay, La., east to a point about 200 miles west of Naples, Fla., and then bending south.
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