Just in case you're considering making a trip to the Jackson area to one of the 3 stores here, I'll give you a quick rundown.
The Fish Bowl in Ridgeland - 0 SW
fish in stock, and a few corals. Owner is trying to sell the business and for the past month every time I ask her about it I get "we'll know next week" It's been a month and next week still hasn't come.
Saltwater World in Pearl - Great store, just not much to pick from. Only about 12 or so display tanks, which aren't very big. He can special order you anything you want, but it's going to take a while. His live rock is the best in the area - esp. for the price. Overall a clean store and excellent advice.
The Jungle in Richland - My personal favorite but the past few times I've gone in there his tanks have had velvet and ich. Never saw one diseased fish in his tanks until a few weeks ago. I got my 2 clowns from here and they're still kickin. I think he's got more stuff in stock in his small store than Foster & Smith have on their site. AMAZING store, but unfortunately right now his fish aren't looking too hot.