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.

That's exactly what the American company Pepperidge Farm aimed for with Goldfish: to create a snack that's out of the ordinary, yet brings a genuine smile with its smooth texture and bold flavor.

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. A new study from researchers has proven that goldfish are capable of learning how to ...