They were in the Mangrove trees. Snook and Mangrove Snapper hang out in there and put up a monster fight. Snook is basically a giant saltwater bass in my opinion, but pretty much all fish in Florida are in those roots.
Here is what they look like. (that is from google)
My first time fishing for Snook, me and 2 friends went out with a guide and he brought 24 dozen pinfish as our bait. Caught a snook or mangrove snapper on almost every darn one of those things. All of our snook were released as they have a really short season and a small slot, like 32-36" or something like that and all of ours we around 20-22" class. We had to throw the snook back towards the roots because a pod of dolphins were behind the boat and would wait for us to throw it back and shoot towards those things like a bullet. Truly it was a bad ass experience