Sea turtles appeared on earth more than 200 million years ago, it is the famous "living fossil." According to the record of "Guinness Book of World Records", it has the longest lifespan of up to 152 years. It is worthy of the old god of longevity in animals. As sea turtles have the longest life span, so coastal people regard them as a long-lived mascot, just like mainland people regard Songhe as a symbol of longevity, coastal people also regard sea turtle as a symbol of longevity. There are eight kinds of sea turtles in the sea, which which four produced in China, mainly in Shangdong, Fujian, Taiwan, Hainan, Zhejiang and Guangdong province in China. The largest number of turtles in China is green sea turtles.
Sea turtles often have activities in the upper level of their regular migratory routes along the coastal waters. They become mature at 20-30 years old. When the breeding season comes, they return to their "homeland". No matter how remote it is, they can also find their own birthplace, and lay eggs there. It is likely that they can not breed lifelong if their birthplace is damaged.
The largest number of nesting is up to 200 or so, the minimum is also more than 90. The number of eggs is more, but the incubation survival rate is very low. When the small turtles hatched, first of all, they must climbed out of the sand themselves, and then hurriedly toward the ocean. It is full with danger when the small turtles go from the sand to the beach, some natural enemies regarding these young lives as a delicacy. To successfully reach the sea is only part of the young turtles, these survivors will grow and develop in the sea, passing a new cycle of reproduction.
It is a very interesting question, "how do the sea turtles maintain the gender balance." Sea turtles mainly live in the sea, they can not only breathe with lungs, but also can take full advantage of some of the special organs to obtain oxygen directly from seawater. They are fully adapted to the marine environment. Sea turtles are large, and have large volume of activities, their appetite is much greater than the tortoise. They eat a lot of fish, fish eggs, shrimp, crustaceans and mollusks and algae every day.
Their teeth are hard and strong, they can easily bit the shell of mollusk. From the habits of the turtles, the secret of their longevity is nothing more than a big appetite, slow activity and a hard outer shell to protect.
Sea turtles are a treasure, the delicious meat and rich nutrient can not only make our own be able to longevity, but also a very high nutritional value of supplement, people who eat can make them live longer. Just as these, more and more turtles are killed by people.