This phenomenon is particularly easy to happen at night. At night, the green plants in the water can't carry out photosynthesis, so they can only take oxygen, which causes the phenomenon of lack of oxygen in the pond. Fish will float, and when the phenomenon of floating head is serious, it will lead to a large area of fish death.
2. In order to feed: Some fish can jump out of the water to prey on dragonflies, birds and small mammals in the air. Typical representative fish are great white shark and salmon, both of which have different jumping skills.
3. Avoid being preyed: Some fish jump out of the water to avoid being preyed by natural enemies in the water. Sometimes they are seen by natural enemies in the water and hunted as food. At this time, they will jump out of the water to avoid being used as food. Many fish have this habit, such as mullet, ray and barracuda.
4. attract the opposite sex: some fish jump out of the water to be active, show themselves and attract the opposite sex, so as to get the opportunity to breed. Most of them are males, jumping out of the water and then diving into the water. The representative fish of this phenomenon are dolphins, beluga whales, toothed whales, killer whales and so on.
5, the environment is different: just arrived in a new water environment, not suitable for this environment. This phenomenon mostly occurs in black pits or aquaculture ponds. The owner of the culture pond puts the adult fish into the into the pit pond. At first, fish will jump out of the water when they don't adapt to the new water environment.