A turtle eats from dead coral on the sea floor outside Gili Meno. The biggest factor blighting the future of the marine turtle is the effect of warming sands where their eggs are laid. Variations in the temperature of the sand determine whether a hatchling is male or female, as well as influencing its physical strength. If the eggs incubate in conditions that are too warm, the ratio swings strongly to production of females. Too hot, and the embryos die.