Giant Gulf Shrimp

I just saw a segment on local TV news that the Gulf is teeming with giant shrimp, some as big as a foot long.
Hmmm.  Let's see.  A little over a year ago there was the huge BP oil leak in the Gulf.  Environmentalists were having a cow over their claim that Gulf life would be destroyed for eons and may never recover.  Now come the giant shrimp.  Is there a cause and effect?  I'm just asking.