Little friends who keep turtles always meet turtles, lying motionless as if they were dead, but later they come back to life. This is because turtles are in suspended animation. How should we judge? The state of turtle suspended animation is that its limbs and tail are all in the shell, as if it were hibernating. At this point, we can gently pull the tortoise's limbs with our hands to see if it retracts forcefully; Or poke the turtle's head with something a little sharper to see if there is any reaction. If there is, it is a state of suspended animation. If it is not possible, the tortoise is really dead. If the tortoise really dies, its head and limbs will be completely flabby. After a long time, it will become stiff, the eyes will be seriously sunken, and it will stink in a few days. Therefore, when raising them, we should always observe whether they are in suspended animation or dying.