Sea turtle

Turtles have existed 100 million years of prehistoric reptiles. Scaly turtle shell quality, although you can stay under water a few hours, but still floating on the surface to regulate body temperature and breathing. .

The largest is the Leatherback turtle; 2 meters long and weighs 1 ton. Olive green turtle is the smallest scales, 75 cm long, and 40 kg.

Turtle shell is the most unique places. It can protect sea turtles from infringement; let them swim freely in the sea. In addition to leatherback turtles, all turtles have shells. Leatherback turtles have a very thick layer of oily skin on the body, showing five longitudinal edges. .

The difference is that with the land tortoises, sea turtles cannot retract their heads and limbs into the shell. The same as the wing is mainly used to promote sea turtle forelimbs forward and hind legs like a rudder when swimming in the control of the direction.

In mature males and females before the body is the same as sea turtles. When the male sea turtles mature, longer thicker tail, because the reproductive organs to the bottom of the tail.

Different types of turtles have different age of maturity. Hawksbill turtle 3-year-old to mature, green sea turtles to mature in 20-50 years of age. Sea turtles must lay their eggs on land; one can produce table tennis-like 50-200 eggs, baby turtles, but only a thousandth of the probability of survival.