Wrong forum to ask this as there is a regional forum for Tampa Bay, but I'm sure Richard would sell you some critters while you're here. His webpage has a list of different things.
To add to figuerres post, check out Creative Aquariums Tampa and their 300 gallon cube mixed reef display tank. It's really awesome with everything from a sweet Carson Surge device to a Derasa clam in the center that I estimate to be 24 inches.