If you happen to spot a letterhead turtle, consider yourself VERY lucky, as though sighting of these species are not common, there are off chances where divers and snorkelers have seen leatherheads swimming in the waters around Maldives. It derives its name due to the texture of the shell; which is quite rubbery and flexible – unlike shells of other turtles. With ridges along its shell, this aids the turtle to swim to a depth of 4,200 feet which also makes it able to stay underwater for around 85 minutes – which what makes it quite a rare sighting. Like the other types of turtles mentioned above, the leatherhead is also under the list of endangered species.