1, the kinematics principle of fish swimming can be described by mathematical model. For example, Bernoulli's principle can be used to explain why the fluid on the surface of an object moving in water, such as the body surface of a fish, is faster, because water needs to avoid obstacles when passing through the body surface, and the flow from a high pressure area to a low pressure area will also lead to a change in speed. These physical phenomena need to be studied by mathematical fluid mechanics.

2. The behavior and ecosystem of fish can be explained by mathematical model. The behavior of fish schools can be based on group dynamics and self-organization theory. Mathematical models can help people better understand the behavior and ecology of fish, and then provide support for protecting the natural environment.