From thermodynamics, air will move from hot to cold, high pressure to low pressure. What that means is that an east wind indicates the location of a low pressure system somewhere to the west of your location. Fish somehow sense an approaching low pressure system, stop feeding, and move to deeper water. Since low pressure systems tend to move generally toward the northeast, and spin counterclockwise, how do the fish know?
I've never understood how fish can sense an approaching low, and run for cover. Water has a uniform pressure as depth increases. How can a drop (or dropping) in air pressure cause this effect?