That would be an interesting lab experiment. In Florida, 20 generations could happen pretty quickly. The further North they "traveled", the generations could take more time. I wonder if they could adapt that quickly. However, I doubt it.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa