Kemp’s ridley turtle is the rarest sea turtle. These turtles weigh 80 – 100 lbs. and appear olive green when fully grown. Due to predation and poaching, their numbers have declined significantly. In the 1940s, there were over 40,000 Kemp’s ridley turtles. In 1981, there were fewer than 500. While some recovery in numbers has occurred, they remain an endangered species. Their nesting grounds have dwindled as well, and all Kemp’s ridley turtles now nest on a single beach near Rancho Nuevo, Mexico.