Common Ray?

www.aquascapeonline.com is selling sting rays they are calling a "common ray" but not listing a species. They are also claiming that they are easy to care for. My guess is that they do not know the species. They are also selling several other rays that I am not familiar with and have not heard of, not that I know much about rays.
Can anyone identify what they are calling a common ray and tell me if the other rays they have for sale are correctly named?

I am just surfing around checking prices and just seeing what is out there as I am planning to build a huge ray tank this summer of fall. I think most if not all the rays from this site a wild so I would not be interested anyway as I will be looking for captive born.