Published: Apr 22, 2014 2:06 PM EDT

JACKSONVILLE, Fla. (AP) - Nearly three dozen sea turtles that were rescued on Cape Cod last autumn have been released in Florida on Earth Day.

The 31 endangered and threatened sea turtles spent months at the New England Aquarium's rescue center near Boston. The group was transported to Jacksonville's Little Talbot Island State Park, where they were released back into the ocean on Tuesday - Earth Day.

A statement from the aquarium says the turtles are mostly juveniles including 28 Kemp's Ridleys, the most endangered, two loggerheads and one green sea turtle.

They washed up last November and December in the frigid waters of Cape Cod Bay and slowly became hypothermic. At the aquarium's sea turtle hospital in Quincy, Mass., they were treated for malnourishment, dehydration, pneumonia and other blood and organ disorders.