My two 10" motoro rays cornered my 6" ntt datnoid once and tried to smother/eat him. Luckily I was on the spot and forced the ray to release the dat or he would have been dinner, even with his spines. It was interesting to see the rays working together, trapping the dat in the corner. I wouldn't have thought that fish would cooperate like that (maybe it was just a fluke and they were both going for the dat at the same time).
I wouldn't be surprised if your rays got him. Do they have an enlarged stomach, near the base of their tail (big lunch)?
I wouldn't be surprised if your rays got him. Do they have an enlarged stomach, near the base of their tail (big lunch)?