(CNN)A group of international scientists are joining forces to save an unusual endangered species -- the so-called "scrotum frog."

The frogs -- whose scientific name is Telmatobius culeus -- primarily live near Lake Titicaca, which straddles more than 3,200 square miles across the border of Peru and Bolivia, over 3,779 meters (12,400 feet) above sea level. They're the world's largest entirely acquatic frog, and their loose skin creates folds and flaps -- which earned the species its unfortunate nickname.