That might help explain why goldfish in healthy environments can reach the size of an American football ... won't keep your fish alive if the tank is too small. You see, as these bacteria gobble ...

Given enough time and resources, these little orange monsters will grow into giants, reaching as much as 4 pounds, or 2 kilograms, about the size ... tank. More from Science Goldfish may look ...

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 ...