I wouldn't say it's back to 100% but the ecosystem is certainly recovering. Check back in a decade and I'll bet you wouldn't know the difference.
Just a cursory google search turned up this story about seafood in NO. It was the most recent story I found on page 1. April 2014
http://www.nola.com/dining/index.ssf/2014/04/the_2010_gulf_of_mexico_oil_sp.html
Sounds like most seafood is back but at lower numbers than before the spill. One would expect that I would think. Just takes time to build up population numbers after a disaster.
^^^ This is what I was talking about.
People are just short sighted in their thinking. I have no idea what the wildlife numbers were before or since, but one thing I do know. If there were a sizable impact from the spill Obama and his minions would be screaming it from every mountaintop, but we hear nothing but crickets. I prefer to think in a more complete scenario. Kind of like a year to us is like a nanosecond to the earth. When the politicians start making statements I call BS because I'm looking at a bigger picture. They are just kneejerking 100% of the time.