Ive been reading that black rays are harder to keep then some other rays. Currently i have a motoro and my next purchase is a leo but im waiting til i get a bigger tank but am wondering how/why they're harder to keep?
They are more expensive but not harder to keep than motoros. In my experience they are just as hardy and they grow to about the same size as a motoro. Motoro's are usually recommended as a good starter ray because they are both hardy and relatively cheap.