Jeremiah bullfrog and goldfish video

I built a goldfish pond. We had a couple of fish, then someone donated 4 more. It was a school of goldfish. I had notice that there were Alewives, a type of herring - an invasive species, that appeared one day. Perhaps in the wetland plants I transplanted.
You build it, they will come.
First it was the green frogs, then the leopard frogs. Finally, or so I thought, Jeremiah bullfrog entered the pond. He seems to have taken over. Next, I found that the alewives seem to have mated with the goldfish.