actually it is not illegal to collect fish and critters for your tanks. There is a list of the things that can be collected without a collectors (resale) permit (which is pricey) you will however need a recreational saltwater fishing license (not so pricey).
HERE is the list of tropicals that can be collected recreationally.
HERE are the ammendments and addendums to collecting in Florida.
Under no circumstances should you EVER take a piece of LR. Even a tiny <1" chunk can get you in a heap of trouble. You are however allowed to harvest a gorgonian with a piece of LR attached to it that is under 1".
I didn't see stomatopods on the list nor did I find any stomatopod info by searching the site. You can probably call them and get more info with regard to stomatopods. Here's the contact info:
Acting Director: Roy Williams
Assistant Director: Roy Williams
2590 Executive Ctr. Circle E., Ste. 201
Tallahassee, FL 32301
Telephone: 850-487-0554, SC 278-0554
(Fax: 487-4847)