Basically, the platform works by moving in a direction based on where the fish is in the tank. Once they had it set up, researchers used color-coded environments to teach the goldfish how to ...

But in your home tank, there's no bacteria to be found. 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.

But they're not just consuming what other fish rely on to survive — their voracious feeding time actually kicks up mud and sediment ... should keep that goldfish in its tank.