Yes Turtle is the common name of turtle, also known as group fish and water fish. It is an amphibian and reptile that lays eggs, and it is the general name of soft-shelled aquatic turtles of Trionyceae.

Appearance characteristics

Some places in the south are called Tanyu and Jiayu. Its head is like a turtle, but its back armor is not striped like a turtle, and its edge has a soft skirt, and its shell is softer than a turtle. Dark green. It is oval, flatter than a tortoise. It has a soft outer membrane on its back and abdomen and a delicate skirt around it. Its head, neck and limbs can be stretched, and each limb has five claws, which makes it crawl very quickly. Judging from the appearance and color, turtles usually have dark green backs and limbs, and some have light brown backs and red bellies.

The shell of soft-shelled turtle is different from other soft-shelled turtles in that the bone shell has no peripheral bone plate, the surface layer is high in texture, there is no angular external bone plate, and the abdomen (abdominal shell) is loosely connected. The trunk is slightly oval, the snout is long, the nostrils are open at the snout, and there are bone nails on the back. The limbs are short and slightly flat, with five toes and webbed membranes between them. The tail of women's body generally does not reach the outer edge of the skirt, and most men extend out of the skirt. Some giant turtles can reach more than one meter.

The soft shell of a turtle can "breathe" underwater through the rhythmic movement of its mouth, which contains many protrusions, which are filled with a lot of blood, similar to the diseased silk of a fish. This enables them to stay underwater for a long time.

Moreover, it has been proved that Trionyx sinensis excretes urea when it "breathes" underwater. This is an effective solution when animals can't get fresh water (for example, in salt water environment).

Be distributed

Trionyx sinensis originated in China. Northeast China, Japan, Korea, North Vietnam, Russian Far East. It has been introduced to the United States and other parts of the world.

Living habits

Aquatic, often inhabiting fresh water areas with sandy sediments. Have the habit of sunbathing on shore. Carnivorous, mainly fish, shrimp, mollusks, etc., mostly foraging at night.

Refer to the above? Baidu encyclopedia-tortoise