Its compositional ichthyofauna differs from its consecuting fiver systems,and has momentous significance on succession of fishes and ichthyofauna dividatur in watershed of North China.

• 在鱼类区系组成上，它与相邻的水域有着很大的差异，在我国北方水域鱼类演替和区系划分上有着重要的意义。