I don't live in Florida but I have collected when on vacation. I always imagined the best way to safely collect fish would be to make a pyramid of PVC pipe. All you would need to do is weight it down, leave it for a while and use an appropriate diameter "plunger" of sorts to gently push on one end and a net on the other. I'm sure there are better and safer devices than a net, but that's what I envisioned.
I have collected emerald crabs, snails, 100s of pounds of reef sand, some purple anemone shrimp, coral banded shrimp, baby conch, sea mats, curlicue anemones, arrow crabs, eels, and some unidentified critters that came with some rock. Iââ"šÂ¬Ã¢"žÂ¢ve found some amazing colored serpent stars, orange starfish, purple Gorgonian and a few other corals. The arrow crabs were evil and I had to donate them.
Amazingly I brought all of the above back home in Indiana by driving in the dead of winter! The stuff was sitting outside in the back of a pickup. This took some serious preparation. I used a Rubbermaid tote suspended inside of a cardboard box encapsulated in AB foam. Basically huge DIY coolers. I individually bagged everything and used newspaper and some heat packs. 2 days later the temp went down only a few degrees! I was shocked. From what I remember everything made it just perfectly accept for the Gorgonian. Gorgonian have always been difficult to transport. The coolest part about taking rock from the ocean is that you may not be able to see it, but there is usually many types of corals and critters on/in the rock. I had a little fish hitch hike inside of a rock and I didnââ"šÂ¬Ã¢"žÂ¢t notice it for months. It was like a blenny or goby, but appeared to only come out at night; it was dark in color and very strange looking.