When you flush a goldfish down the toilet does it grow big and ugly?

Flushing a goldfish down the toilet does not cause it to grow big and ugly. In fact, goldfish cannot survive in the sewage system; they require a specific environment to live, including proper oxygen levels and water temperature. If released into an environment like a sewer or a river, they may not thrive and can even harm local ecosystems. It's best to find responsible ways to rehome or care for pet fish rather than flushing them.