text: how do i catch mullet in northeast florida? brackish water - st. johns tributary hey, find a canal, there are a lot off of university in jax. or on the northside. go at low tide as early in the am as possible, we always caught more while it was still dark. use a cast net, and be sure to take mosquito repellent they will eat you up!!! where are you? we have fished from st. augustine to jax, lots of great places to go.