A few aros yeah, they had some ornates at one point (if you know anywhere that actually has a selection of bichirs please let me know) havent seen any rays. They usually have some nice cats though.
Jax is lousy for good LFS's. There used to be a few, but they all went belly up a few years ago. The best your gonna find is the chain stores. There might be something in St. Augustine, but I haven't looked that far.
Edit: There is a store on Beach Blvd. by University that has a few unique fish every once in a while. I can't remember the name though.