Tank size would grow with the Ray, initially, a 75 with almost an entirely open sand bed. As I work with a friend to create custom fish tanks, size restrictions are not an issue. We currently have a 550 gallon tank with a walk through arch in storeage
. Species wise, I don't know. My friend has a generic "teacup" he's willing to give me, but I'm still looking and researching. Not ready just yet.