The HBG will reproduce, but the offspring revert back to the Green Sunfish and usually stunt.
Hold up, I thought hybrids never reverted back to their original parents' species?
Omaha, you are correct. From all the reading I've done, they may attain a state in which one of the parent species' traits become very dominant, but it does not seem that a hybrid will EVER actually change its genetics to another species, even if it's a parent species. Maybe we'll get some true expert feedback on this to confirm or refute, but I'm with you 100%.