It's already one of the world's most endangered animals, but the very survival of the Kemp's Ridley turtle was dealt a massive blow by the BP oil spill in 2010.
At the time, scientists had been moving eggs in a desperate bid to save the species.
Now, as part of our "What happened Next?" series, Rachel Levin travels back to Tamaulipas reserve to see how the turtles are doing.
Al Jazeera's Rachel Levine reports from La Pesca, Mexico.