Oil Spill Good For Environment?

From Alabama.com: There were nearly four times as many fish, shrimp and crabs in Alabama waters in the fall of 2011 as there were before the BP's Gulf of Mexico oil spill, according to scientific data collected by the Dauphin Island Sea Lab.
Scientists believe the months-long fishing closure caused by the spill helps explain the dramatic increase, which first became apparent in 2010, months after engineers capped the Deepwater Horizon well. But other factors may be at play as well, researchers said.
“The increase certainly indicates that the waters in Alabama are in relatively good shape, at least the nearshore waters,” said John Valentine, director of the Sea Lab.http://blog.al.com/live/2012/05/nearly_four_times_as_much_sea.html
I'm sure there are some legitimate reasons for this but it also seems like the long term disaster predictions  is not as bad as many supposed "experts" had thought it would be.