A dinky, single-gallon bowl is much too small, and even the 10-gallon tank you see in every pet store won't cut it. A single adult goldfish needs at least twice that much water to thrive.

The Department of Fish and Wildlife thinks that a few irresponsible pet owners are to blame ... are other reasons you should keep that goldfish in its tank. More from Science Goldfish may look ...

If you want to start an aquarium of your own, I asked Sanders and Rosenbloom about everything you need for new pet fish, ...