I had goldfish in my swimming pool for a little over four years. Some were gorgeous butterfly finned and fan tails. I had a large algae bloom and in killing the algae, all of the fish suffocated. I tried to save the eggs from the best females and the love lotion from the males. It didn't work. I just ended up with a stinking mess. From the force required to remove the eggs, yes I think it will kill any fish. I ended up cutting the fish open because squeezing them did not produce many eggs. Some fish ruptured without producing many eggs out the vent.