Pond Boss Forums INTRO Questions & Observations fathead minnows??

Fathead Notes. Fatheads do not die after spawning. We used to raise them as laboratory animals for using the fry in toxicity testing. Some lived to be four years old; spawning many times. They don't live long in the pond because they get eaten. Males often accept eggs from more than one female and up to 12,000 eggs per nest have been recorded. Typically females lay 80-370 eggs at a time. Number of eggs per nest often depends on the available area the male can prepare for the nest. Eggs can sometimes be two laryers thick in parts of the egg mass. Eggs hatch in 4 to 8 days depending on temperature.