A long-term tagging and nesting study of green and hawksbill turtles in Chagar Hutang, Redang Island was initiated in May 1993. This long-term project will provide basic, yet vital information on the population sizes, monitor yearly population fluctuations, study reproductive and nesting behaviour, and determine the success of “in-situ” and relocated nests. All sea turtles will be double tagged. Measurements on the size of the turtles are also taken to estimate their growth rates. The turtles are also visually examined for scars, injuries and diseases.