How to implement a simulation of a body of water viewed from the side

[ZQCJ123]

I made a fish tank, it's made of glass, after I put the water body into the fish tank, only the top view is able to see the water body, from the side view in addition to the surface of the water out of the wave line, the underwater part of the water is all transparent, I want to be able to look from the side view, like a real body of water, what should I do?