A 20-gallon tank is suitable for a single goldfish. Yet, these fish can quickly outgrow their aquariums, so you may consider starting with a large tank. Tank size gets more complicated if you’re ...

These big fish are also big eaters ... disasters there are other reasons you should keep that goldfish in its tank. More from Science Goldfish may look small and cute in your home, but in the ...

Instead, the study showcases how researchers taught goldfish to traverse the land in a tank on wheels. The idea behind the study appears to have been an attempt to better understand animal ...