Why do some turtles lay eggs during the full moon?

Answer 1

Tides are controlled by the moon. The high tide gives the deepest water, allowing the turtle to move as far inland as possible, so that eggs are laid ABOVE the high water mark- otherwise, they won't hatch.

Answer 2

Not all turtles lay eggs during a full moon. However, many turtles lay their eggs at night to avoid being detected by predators.