Friday marked the two-year anniversary of the disastrous BP oil spill. Triggered by the explosion on the Deepwater Horizon drilling rig on April 20, 2010, the tragedy took the lives of 11 people and continues to threaten the animals and ecology of the Gulf of Mexico. Two years later, TNR takes a look at some of the animals that continue to be affected by the spill, which spewed about 4.9 million barrels of oil into the water.

Dolphins

In the two years since the BP spill, over 600 dolphins have been found washed up on Louisiana beaches: 95 percent are already deceased. These numbers are eight times the pre-disaster average. A report by the National Oceanic and Atmospheric Administration has found that the affected dolphins have liver problems and deflated hormone levels, which may be the result of exposure to chemicals released from the spill.