Published: Apr 12, 2011 8:26 PM EDT
Updated: Apr 12, 2011 5:26 PM EDT

NEW ORLEANS- A new report by a prominent environmental group says the effects of the BP oil spill on the Gulf of Mexico and the animals that live in it will take place over years, if not decades.

The National Wildlife Federation says it is much too soon to make snap judgments about how much harm has been done. According to the report,"Other oil spill disasters have taken years to reveal their full effects and often recovery is still not complete after decades."

Douglas Inkley, a senior scientist with the group, says it's far from clear how much damage had been caused to bluefin tuna, shrimp, sea turtles, dolphins and pelicans.

The report was issued Tuesday in advance of the first anniversary of the BP spill on April 20.

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