Thanks, Jason!
ReisAntonio,
Thanks for your input, for sure! So far, you are the first person to tell me hystrix are not good beginner rays. In fact, most people I have spoken to or pm'd here and on other forums have actually told me it's a great choice, just hard to find. I'm not discounting your claim, however. I truly don't know. Is anyone else of that opinion? Tank size matters, so it will need to be a smaller type ray... one where the males stay at about a 12" disc, give or take. From what I can tell, the added benefit of the hystrix is they don't have a long tail either.
Regarding the cichlids, if the Oscar is a no-no... and honestly, given how messy I am learning rays can be, I'm starting to reconsider that one... no need for two really messy fish in that tank... I'd be fine with it. I am actually thinking about just maybe using a few severums and perhaps school of some kind of medium sized barb, tetra or silver dollar type fish. In other words, I'm open to building the correct tank mates around the ray, as opposed to forcing it to be with unacceptable tank mates.
-Rich