Molly sizes are never huge, but they're larger than you might expect from a small tropical fish you buy at a pet store. Larger breeds like sailfin mollies, due to their long body and large dorsal ...

If you want more than one type of fish, you should probably just go ahead and get a 20-gallon tank, which is still “small” in the aquarium world. No, they don’t “grow to the size of their ...

The fish can live up to 40 years, but the longest Kraul said he has been able to keep one alive is 42 days — a whole month and a half before they even develop their distinctive yellow color.