In April 2007, eleven leatherback turtles captured the imagination of the public worldwide as they -raced- from Costa Rica toward the Galapagos Islands. Known as the Great Turtle Race, this event tracked these critically endangered sea turtles, drawing attention to their fragile status and generating data on the turtles vital to efforts to study and protect them.

But the Great Turtle Race is just one of many tools marine conservationists use to inform people about the status, biology, and lives of the seven sea turtle species. Due to human actions, once-plentiful sea turtle...

Weighing as much as 2,000 pounds and reaching lengths of over seven feet, leatherback turtles are the world's largest reptile. These unusual sea turtles have a thick, pliable shell that helps them to withstand great depths--they can swim more than one thousand meters below the surface in search of food. And what food source sustains these goliaths? Their diet consists almost exclusively of jellyfish, a meal they crisscross the oceans to find.

Leatherbacks have been declining in recent decades, and some predict they will be gone by the end of this century. Why? Because of two primary...