The saying "carp jumps over the dragon gate" is a metaphor for the habit of carp of jumping into the water. Carp and many other fish like to jump. Different fish jumping skills are different. Some fish jump very high, such as a kind of fish called "jumping fish" fish, it can jump from the water surface of four to five meters, can be said to be the fish in the "high jump champion". Carp can sometimes jump out of the water more than one meter. Another reason is the physiological changes, when the fish to the time of reproduction, the body can produce some of the stimulation of the nerves, so that it is in a state of excitement, so especially like to jump. When the fish is retrieved from the water, will also jump around, the reason is that the fish swim in the water, the whole body muscles are always stretching and contracting, wagging head and tail, in order to make it in the water forward.