First, let's look at turtles with multiple names.
The soft-shelled turtle belongs to the family Trionychidae. In China, soft-shelled turtle has many common names, such as tortoise, soft-shelled turtle and mud turtle. Among them, turtle is the most common generic name. So, why is the tortoise called the tortoise? In fact, this name should start from ancient China.
In addition, as a member of turtles, there are more than 20 different species in the world. As the most common turtle in China, it is distributed in almost all parts of China (except Tibet and Xinjiang), so the most common turtle is called "turtle" instead of turtle.
As for the name turtle, it is easy to understand. Turtle is a creature that lives in fresh water. It often swims in the water like a fish, and has a hard shell on its back, so it has the name "turtle".
form
Although turtles and soft-shelled turtles are animals with short limbs and a "shell" on their backs, their shapes are quite different. The first is the difference between the two shells. The turtle shell is very hard, with obvious turtle lines on it, while the turtle shell is soft, with no obvious turtle lines on it. Secondly, the tortoise's limbs and head can be retracted into the shell, so that they can rely on the hard shell to protect themselves when they are in danger. But turtles are different. Its head and limbs cannot be completely retracted into the shell. Finally, the tortoise's head is round, while the tortoise's head is slender.
strange hobby
All turtles are freshwater animals, but turtles are different. Some of them live in fresh water, while others live in seawater. Secondly, most turtles can walk on land for a long time, even if they are underwater, but they are different. Except for laying eggs, most of them stay in the water. Even if you go out to bask in the sun, you find a protruding place in the water. When you are in the water, most turtles like to stay in the mud and wrap themselves up.
soft-shelled turtle
Soft-shelled turtle is a common name for soft aquatic soft-shelled turtle of Trionyceae. Also called tuanyu, water fish, etc. Some places in the south are called Tanyu and Jiayu. The turtle's head looks like a turtle, but its carapace has no stripes, and its edge has a soft skirt, and its shell is softer than the turtle's. The shape is oval, flatter than the tortoise. A soft outer membrane is attached to the abdominal carapace, surrounded by a delicate skirt. The head, neck and limbs can be stretched, and each limb has five claws. Judging from the appearance and color, turtles usually have dark green backs and limbs, and some have light brown backs and red bellies.
Moreover, their genera are different. Turtles belong to the class Tortoise, and turtles belong to the class Tortoise. We've all heard of pussies. The most typical feature of turtles is that when they are in danger, their limbs and heads can be retracted into their shells for protection. Turtles don't have this feature, but we must be careful when catching turtles. This animal has a bad temper. When attacked, it will bite the target, and it is difficult for some people to let go.
Chinese grass turtle, authentic turtle.
Turtle and soft-shelled turtle are collectively called turtle, soft-shelled turtle and soft-shelled turtle (some are called soft-shelled turtle, which is easy to be confused), so it is easy to distinguish them. Turtles have a hard shell with various lines on it. According to the living environment, it can be divided into turtles, turtles and freshwater turtles. Many species are kept as pets, such as the cheap and rampant Brazilian tortoise.
Through the above introduction, it is not difficult to see the difference between tortoise, tortoise, soft-shelled turtle and soft-shelled turtle. In fact, to sum up, tortoise is the general name of tortoise and soft-shelled turtle, and soft-shelled turtle is the common name of soft-shelled turtle. There are three differences between soft-shelled turtle and soft-shelled turtle. First, the bite force of soft-shelled turtles is stronger than that of most soft-shelled turtles. Second, there is a meat skirt around the shell of the turtle, but there is not. Third, turtles can contract their whole bodies, but turtles can't.