There is not much scientific data about air pressure and fish. I don't believe it is the pressure changing, but the resulting weather conditions. However, if a high or low pressure condition become stationary, the fish clam up.

High pressure systems tend to bring fishes to my dock and low pressure systems tend to drive the fish away. If the pressure is beginning to trend up or down, there are moments of frenzy feeding at my dock.

In other words, blue skies go shallow and look under logs. Cloud cover, just try a little deeper.

I am not an expert and I ain't ever met one, yet.