Well everyone got the castexi right, I've got to guess as the rest of you as I never saw any breeding action before the pregnancy but I would go with the pearl also. There was also a Tiger and Hen in with her that have been showing signs of breeding with other females.
Ya it's harder to tell with some rays who the parents are and there is also the possibility of more than one dad. I usually know the parents but I've been so busy lately that I haven't had the time to follow my rays.Scott, its funny how the breeder not sure about the hybrid . So we all can guess and all can be wrong, only the parent knows hehehe.
they look great though! big and healthy!