It sounds likr that could be a Respiratory Infection if he's gaping and has saliva...Don't give up just yet, keep him warm and comfortable. Can you call the vet and explain that he's on his death bed, see if they will work with you. I got the antiobiotic for my beardie's R.I for $12.00...please call the vet and at least try. Also, how far is the Megaray away from him and how old is it?