I have four of them, single male (about 11" disc) and three females (1 10" disc and 2 8") all are from Columbia. I have had the two largest ones for almost a year and the two smaller since November, they have been tough to get off of night crawlers, but, now that they have, raw shrimp and other seafood is eaten with gusto, still no on the pellets LOL. I find them to be quite laid back, though that may change as the male matures, his claspers haven't started to grow at this point. I have read that these are supposed to be one of the smaller rays, but, who knows since there really isn't much info out there on them. I would love to find out how big they will really get, hopefully not too large!
Hope that helps, if there is anything specific you are wondering, just let me know.
Ray