What started as a few pet goldfish dumped into a man-made pond has turned into an overwhelming invasion — and a stark reminder of the valley’s growing problem with animal dumping and pet surrenders.

You have to introduce it, and that's where a lot of goldfish owners slip up because you can't just buy a fish the same day you get your tank. The process of growing bacteria takes patience.

Goldfish may look small and cute in your home ... Given enough time and resources, these little orange monsters will grow into giants, reaching as much as 4 pounds, or 2 kilograms, about the ...

Instead, they created an invasive problem that can last decades.” Officials said “goldfish grow massive in the wild,” and threaten native fish species by stealing food and ruining water quality.

The very goldfish you often see swimming around in fishbowls and small aquariums (Carassius auratus) can grow to enormous sizes when released into the wild — topping out at a maximum length of ...