Good God, these are goldfish. We're not talking hundred-dollar koi here. I go the pet store, and the feeder fish swim by the hundreds in big tanks. Their sole destiny in life is to be fed to things that eat little fish. I bought them now and then to feed a pet crayfish, just like I bought live crickets to feed my kids' lizards and frogs. I do have arbitrary limits here. I draw the line at feeding live mice to snakes, although I know plenty of people do it. In fact we raised a live mouse and rat to a peaceful death by old age because my daughter "rescued" them from being snake food. The rescue zoo I went to up at Big Bear used frozen mice for their snakes. I guess you can train a snake to eat them.