There are a few species of s.w. sting ray that are suitable for home aquariums. I regularly have the Cortez ray, yellow ray and the California ray. (if needed I can supply scientific names) The cortez is the smallaet, I have had them for several years only getting them up to about 10 or 12 inches. They are not very picky eatters, I feed mine a broad range of foods like shrimp, squid, Ocean Nutrution's Formula foods etc. They are very wimpy, don't keep fish that nip with them such as Angel fish, most puffers, triggers, strangly enough butterflys often pick at sting rays especially the heniochus. Sting ray do not acclimate easily, I put them in buckets or rubbermaid tubs with an air stone and very slowly drip water into their tub from the aquarium thay are going into. I use a piece of airline tubing with a loose knot tied at the end to regulate the drip rate. A ten gallon aquarium is not an ideal size for a salt water aquarium. A 30 to 55 gallon is about as small as I would suggest. Not to say that smaller aquariums can't be done but you wont have much room to make any mistakes (and you will) and not to many fish will do well i such a small enviroment. The best piece of equipment you could buy if your thinking about doing a salt water aquarium is a real good book on the subject. Suprisingly, the "Salt water for Dummies" book is great. I have read it and was suprised at the accurate and easy to understand information it provided. (I am not new to salt water, I have 20+ years experience) A sting ray needs a tank with a lot of bottom space with a softer substrate. I use Carib Sea's aragonite sand for sand. A 48"x18" (75 or 90 gal) is as small as I would suggest for a small ray, depending on what specie you get, you may need to get a bigger aquarium. Don't get the southern ray, they get huge!!!! THe blue dot ray is beautiful and doesn't get to big but is tough to do well. Good luck...Joel