© U.S. Fish and Wildlife © Brian Gatwicke
© P. Lindgren © Theirry Caro

 

Photo credits, clockwise from top left: Dermochelys coriacea © U.S. Fish and Wildlife; Caretta caretta © Brian Gatwicke; Chelonia mydas © P. Lindgren; Eretmochelys imbricata © Theirry Caro.