Besides sea snakes, the most famous is the "living fossil" turtle. The ancestors of turtles appeared on the earth more than 200 million years ago. Ancient turtles and powerful dinosaurs experienced a prosperous period together. Later, after vicissitudes of life, dinosaurs became extinct and turtles began to decline. However, under the protection of the hard shell, the turtles overcame countless bad luck brought by nature and survived tenaciously. Turtles have trekked for more than 200 million years, and are still surviving and reproducing from generation to generation. They are truly ancient, tenacious and precious animals.