Although the shooting rate of spray fish is high, their main food source is floating objects and plants on the water surface, including crustaceans and small fish.

Scientists are still puzzled about the behavior of spray fish catching insects. It is said that the abundant food in the water can meet the needs of spray fish. However, it is found that water-jet fish have a special interest in catching insects on land. Although shooting insects with water is acquired.

The study found that this kind of fish was not able to shoot down insects at birth, but when they saw other fish successfully shoot down the target, they would try to learn this behavior. Through training, the accuracy of shooting down the target is improved a little, and even the moving target can be successfully shot down, and the accuracy is greater than 50%.

To some extent, catching insects is more like a hobby.