Mangrove snapper will be around every dock, smaller circle hooks and dead shrimp will work on the little guys, but the big ones are fairly smart and hook shy. If you can get a kayak there will be opportuities for cuda and grouper around the mangroves, maybe tarpon too.
Headboat trips are fun if you're trying to fill a cooler, braided line helps on those or they'll supply the tackle. Really feeling fancy? Get a guide, they can show you around and go after whatever you're interested in. Dont forget to swing by Robbies and feed the pooons! Touristy AF, but I love it still.