The average life span of green sea turtles in the wild is more than 80 years. It takes anywhere from 20 to 50 years for the marine animals to reach sexual maturity.
Green sea turtles spend nearly their entire lives in warm tropical and subtropical ocean waters, visiting land only for occasional sunbathing or to lay eggs. The most dangerous time of their lives is when the young hatchlings make their way out to sea, as they are the target of a number of predators, including crabs and gulls. Despite being listed as an endangered species, the turtles are still killed for their meat and eggs and suffer from the destruction of their nesting grounds by humans.