An unusual question, I admit...
I'm new here and came looking for input form more experienced folks on a question that's a bit too abstruse for the usual web searches. What I'm interested in are things that might cause fish (domestic or wild, either way) to (1) lay eggs that were (2) sterile. I've found plenty of resources out there describe infertility in fish such that they never lay eggs at all, but I'm really looking for conditions that would cause them to lay eggs that simply never have any hope of hatching into new fish, even under ideal conditions. I realize what I'm describing may not happen, and I certainly don't want to MAKE it happen to any fish, but the information itself would be useful for some research that I'm doing. Many thanks in advance.