Among sea turtles, leatherback turtle is the largest. It can be up to 2.5 meters long and weighs about 1000 kg, so it is called "giant turtle".
At the beginning, the turtles and dinosaurs that stood out in Mesozoic experienced a prosperous period. Later, after several vicissitudes of life, dinosaurs became extinct one after another, and all the Mesozoic biological overlords withdrew from the historical stage. However, turtles overcame all the difficulties brought by nature and survived tenaciously under the protection of their hard shells and abdominal shells. Turtle is a veritable ancient, tenacious and precious animal, and it is also a well-deserved longevity animal among animals.
Every time turtles lay eggs, they will cross the ocean all the way back to land to lay eggs. Moreover, the spawning ground must be a sandy beach, and it can't be reached when the tide is full. The beach is wide, the slope is small, and there are no obstacles such as rocks in front, which is the best place for turtles to lay eggs.
At night, turtles will gradually climb from the sea to the beach, dig a pit about 20 cm wide and 50 cm deep, and start laying eggs. The tortoise's eggs are as big and round as table tennis. Because the maturity time of eggs is different, sometimes it takes several times to lay eggs. After laying eggs, the tortoise blocked the hole with sand. Warm sunshine and comfortable beaches create an ideal incubator, where little turtles slowly breed changes. When the sand temperature is between 28℃ and 30℃, it takes about two months for the baby turtle to break out of its shell. After that, it will instinctively climb into the rough sea, start its own hard life, and follow the path taken by its ancestors to the ocean. After about 7-8 years of sexual maturity, they began to have children. Adult turtles, no matter where they roam, will definitely return to land when it comes to spawning.
People are always interested in how turtles can find their hometown accurately without getting lost. Unfortunately, this is still a mystery. Some people think that the tortoise has its own "compass", which can tell the direction according to the position and height of the sun during the day and navigate by the stars in the sky at night. Some people think that turtles have a super memory for the smell of the sea water they first came into contact with at birth, and they rely on their keen sense of smell to find their homes.
Apart from being born and breeding on land, turtles spend most of their time in the sea. They can not only breathe with their lungs, but also absorb oxygen directly from seawater with some special organs of their bodies. Its limbs are thick and paddle-shaped, suitable for paddling. Turtles look clumsy on land, but they move freely in the sea. It has completely adapted to the marine environment. Turtles are big and active, so they naturally eat a lot. They eat a lot of fish, eggs, shrimp, crustaceans, mollusks and algae every day. Turtles have no teeth, but their beaks are so sharp that they can easily bite through the shells of mollusks. Judging from the living habits of turtles, their large capacity, slow exercise and physiological functions of hunger and cold tolerance are the reasons for their long life.
The tortoise is gentle and lovely, and is full of treasures. Tortoise shell, also known as tortoise shell, is a valuable raw material for medicinal materials and handicrafts. Meat can be eaten and fat can be used to make soap and cosmetics. It is for this reason that human beings are killed at will, and more than 300,000 mature turtles are buried by human hands every year. In order to protect turtles, after 1960, various countries that caught turtles took measures such as prohibiting digging turtle eggs and catching turtles, and carried out artificial breeding of turtles. Turtles are friends of human beings. In order to make this famous "living fossil" live with human beings forever, we can't scratch and destroy their living environment. In a word, it is everyone's responsibility to protect turtles.