nice pdr u got bro cavallino, its such a pity it has to go on to fish heaven.. was it your only ray?
get another ray and put it into fish tanks next time lor.
btw, tyson, i read that in South America, where rays come from. they got season, depending on water level. so maybe it could be factors that help induce your rays to breed?
during low water season, they mate. coz easier for the male to catch the female withouth her having alot of water height to swim away. plus also nature instint to want to faster reproduce? as they know that when the flooded season comes, the puppies would be born at the most optimum time..
so maybe you can try playing around with water levels in periods? well, can give it a try, nothing much to lose mah.. experiement till you get them!