Biologists Jenna Cormany (L) and Lauryn Wright of the South Carolina Department of Natural Resources help to release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. The 475-pound turtle was the first living leatherback turtle to be recovered in South Carolina and one of only a handful ever treated at rehabilitation facilities in the United States. It was found March 7 on the beach on Yawkey-South Island Reserve, a 3.5-mile-long (5.6-km-long) barrier island and wildlife preserve near Georgetown, South Carolina. (Photo by Randall Hill/Reuters)

Staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Biologist Lauryn Wright of the South Carolina Department of Natural Resources helps to release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, transport a leatherback turtle using a special box, to be released in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Turtle volunteers look on as staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

Turtle volunteers look on as staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources, release a leatherback turtle in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)

A leatherback turtle navigates back to the ocean after staff with the South Carolina Aquarium, the Sea Turtle Rescue Program and South Carolina Department of Natural Resources released it, in Isle of Palms, South Carolina March 12, 2015. (Photo by Randall Hill/Reuters)