Yes, this is one aspect of barometric pressure most people are ignorant about; however, in an actual sense, barometric pressure does affect the feeding habits of fish. The ocean or water bodies are at a low altitude, and as a result, they will be naturally high-pressure environments; therefore, fishes are used to living in a high-pressure environment. Well, fishes can detect changes in atmospheric pressure using their bladder, and fun fact: they can feel it much quicker than we humans do.