The BP Oil Spill Killed a Lot of Dolphins

The explosion of BP’s Deepwater Horizon oil rig in the Gulf of Mexico in 2010 had a deadly effect on at least one ocean dweller: bottlenose dolphins.

A new study from the National Oceanic and Atmospheric Administration released Wednesday said lung and adrenal lesions found on dead bottlenose dolphins that were stranded along the Gulf coast from June 2010 through December 2012 are consistent with the effects of exposure to petroleum products after an oil spill.

The report supports earlier studies that suggested a link between the oil spill that gushed 4.9 million barrels of oil into the Gulf over the course of 87 days and mass dolphin deaths in Alabama, Louisiana, and Mississippi.

BP recently settled claims with oil services provider Halliburton and contract driller Transocean related to the spill.

This article originally appeared on Fortune.com