There is a distinction between a ribbon tailed blue spotted stingray and just a blue spotted stingray. The ribbontail is fairly difficult to keep and most die of unexplainable causes. On the hand the standard blue spotted ray is a little easier to maintain but grows a little larger. Both stingrays need plenty of bottom space. If you decided to keep either one a 200 gallon or larger system with minimal bottom obstructions would be neccesary. I currently have a blue spooted ribbontail in a 1700 gallon reef. I have almost lost her because of again unexpalinable causes, but just as suddenly she perked back up. I wouldn't suggest them as a first saltwater ray. There are many hardier specimens of equal size better suited to aquarium life.