Some fish will play dead, but not all fish will. Many times, people see fish pretending to be dead, in fact, it is not pretending, but because it is sick or motor nerve is damaged, leading to the phenomenon of suspended animation, it may be sleeping, or due to hypoxia caused by fainting, it looks like dead.
1. Frightened: Many fish growing in the wild, when they are frightened, especially in the face of natural enemies, and there is no place to hide, is to open the play dead mode, this time they will belly up, suspended in the water. When their enemy is attracted to something else, the dead fish will recover immediately and then quickly swim to another place to escape.
2. Transient hypoxia: When the oxygen in the water is insufficient, the fish will faint. At this time, it is not dead. Some can breathe on the surface of the water. As long as oxygen is added to the water, the fish will return to normal state. It should be noted that if the fish have the performance of hypoxia, we should pay attention to oxygenation at ordinary times, otherwise there will really be life-threatening.
3. Not adapting to the water body: Newly bought fish often have a few days of inadaptability after entering the new fish tank. At this time, there will also be the phenomenon of suspended animation. It will be fine when they slowly recover. In peacetime, we must pay attention to maintaining water quality, water temperature can not change too much, which will affect its health.
