I thought the same thing!!!!!
It has to be possible (if its possible to squeeze it out of them, maybe it only works with some fish? I will do some google-ing on this.)
well found a video on youtube and apparently they just gut the fish to get the eggs and the sperm out so I don't kno how you would trade your fish's life for a possibility of a hybrid. But if you can squeeze then I tstill think its worth trying.