So far I know the motoro is a female and the hystrix a male. The retic im pretty sure is a female but is still small. my motoro is the biggest the hystrix isn't very big either. So far they are very gentle with each other. But hopefully the retic will be a decent size by the time he becomes a man lol...but I would deff remove her if ithat happened. The motoro is bigger then the hystrix so im not at all worried about her..she will whoop his butt. So far so good though. I have been keeping waterbabies almost 8 yrs now and stingrays are the most amazing thing I have kept this far. Im in love.
And thanks for the comments...Im a bit picture crazy sorry lol