A concentrated oil burn in the Gulf of Mexico, conducted in May 2010 (Pic by Deepwater Horizon Response, via Flickr) Though BP has continued to deny that any of its gulf wells are leaking oil, a large-scale oil slick reported in the area is worrying Gulf Coast watchdogs. Concerns abound that the oil could spell trouble for area fisheries, especially since reports of dead dolphins have persisted in recent days. Since Tropical Storm Lee recently made landfall in the Gulf Coast region, tar balls have started washing up on the shores of Louisiana all the way to Florida