I researched this a bit. I'm pretty sure with a saltwater fishing license you can take 20 animals a day, 5 of any single species. There is a 2 day possesion limit (so 40, 10 of any species).Each polyp of zoanthids counts towards the total and you can also take ricordia. The florida dnr or whatever spells it out pretty clear on what you can and can't take and how much. Also make sure where ever you do your collection isn't a protected area. Also def. No hard coral or live rock, and there can't be any live rock connected to what you collect and you can't destroy live rock to collect anything.
Oh yeah you also can't sell or trade whatever you collect.