This site has a lot to offer for the Marine Hobbyist... Overall it is easy to navigate and to order from. And the shipping is FREE through FedEx. They have an impressive selection of fish, invertebrates, and corals, as well as aquarium supplies. Generally, they include quite a bit of information on the site about almost every animal they sell. Most of the prices are pretty competitive, but the things that are on sale are almost always GREAT DEALS! The company offers a very reasonable return/guaranteed live arrival policy.
In my opinion one of the best reasons to visit this site is the huge message board area. The forums are full of experienced hobbyists just waiting to answer all of your questions. No matter what it is concerning...being a new hobbyist, reef tanks, lighting, diseases, acclimation, feeding, compatibility, photography, nano tanks, seahorses and much more. More than 2million posts to look through! Chances are your question has already been answered! There are even classified listings!
The down side is they do require you to buy a minimum amount of $79.00. That is not hard to do, Believe me! And don't forget the shipping IS free! You can join their mailing list they will send you a list of fish and invert "Specials". If have bought from them before there is a repeat buyers program and you can get some stuff for free. They have a good reliable record with the aquarium hobbyist community at large. And they really do have a ton of repeat customers which should speak for itself...
http://www.saltwaterfish.com/