You’ve probably heard the saying, “1020 the fish are plenty”? This is in reference to the Barometric Pressure and when it’s over 1020hPa… the fishing is good. But how does the barometric pressure affect the fish? The most common theory that been around for many years is the direct impact on the swim bladder on the fish… but this theory had its flaws. So I decided to do a deep dive into barometric pressure and explored other avenues as to how it directly impacts fish, especially freshwater fish. In this episode I look at swim bladders, and how they work. As well as exploring dissolved oxygen to see if this has a direct correlation to pressure changes. What I find in this episode is fascinating… and well worth a listen for any angler – fresh or salt. Enjoy!   In this episode: 1:00 – Introduction into Barometric Pressure and Old Theories 10:00 – Does Dissolved Oxygen Change During Barometric Pressure Shifts? 19:00 – Fluctuations of Dissolved Oxygen in Freshwater Impoundments  25:00 – How Do Fish Swim Bladders Work 45:00 – How Does Barometric Pressure Effect Fish?