Hey, Let me first start be stating you will need to make an upgrade alone just to house the Shark ethically. Your 200 will not do, you will need to upgrade to a 350 to house the shark for life. Also at 24" width your tank is really to small to house any Ray. However, if you plan on upgrading to a tank with atleast 30" width, than I would recommend the Cortez Stingray. If you need one, I can help you get one. Also as for other tank mates you can go with Tangs, Eels, Groupers, Clowns, Squirell Fish. Anything except Angels, Butterflies, Triggers, Puffers basically.