That's only part true
Yeah, but if the bowls really small, they'll be really ill and have a bad life, and will probably die before they actually GET to grow >_<
If the tanks bigger, they'll live longer, and obviously, get to grow because they'll be living longer
It doesn't !
Cause they are in a small bowl
There's a bit of myth around this. Goldfish won't grow properly in a bowl and are likely to die before they're even sexually mature (they are not considered mature until they are over 2 years old). In a small unfiltered bowl water quality can turn toxic within 12 hours, that toxic water will stunt the fish, not tank or bowl size! If you had Goldfish in a small tank or bowl but managed to miraculously keep water quality healthy, they would continue to grow until they could no longer turn around, and then become so stressed they get sick, and then they would die from that instead. A fish in a bowl is a lose lose situation for that poor creature! Goldfish need massive over filtered tanks.
A beta or goldfish might be able to grow
When a fish grows as large as its environment it is an example of a limiting factor to the fishes growth. That is why a goldfish will grow larger with a larger tank.
Goldfish have the potential to grow very large if given the necessary amount of space from the very beginning. This means that if you put one goldfish in the recommended 20 gallons on it's own, it could potentially grow quite large.
No it will not. It will be runted by the lack of room. In order for goldfish to grow to full size they should be housed in ponds or very large aquaria.
no, because they need lots of space if there ganna grow so big.
Goldfish release growth-inhibiting hormones into the water they live in: the more goldfish in a smaller space, the less likely they are to grow. For instance, if I have a common goldfish in a 5 gallon tank, it will grow to about the same size if I had 6 of the same fish in a 30 gallon tank. But leave that fish alone in a 30 gallon tank, and it will grow larger. This is why pond goldfish grow bigger. But goldfish won't grow at all in seawater; they aren't saltwater fish.
Yes, the rate at which a goldfish grows, and its overall size, is often partially determined by its environment. This is why pond goldfish are considerably larger than aquarium goldfish, and why goldfish that are cramped-up in bowls stay relatively small. If you want your goldfish to grow into large healthy fish you'll buy them a large aquarium or pond to live in.
Only if you're ok with it dying in a few days. A goldfish needs a minimum of 10 gallons to itself, preferably 20, to allow them for room to grow as well as to account for the amount of waste they produce. They can grow fairly large and are considered messy fish, so they need room and plenty of filtering. A betta fish bowl wouldn't allow for any of those things.
No. Goldfish grow very large and are messy. Fancy goldfish need 20 gallons of water per fish plus 10 gallons for each additional fish (so 50 gallons at minimum for 4). Common and single tail goldfish need 30 gallons each plus 20 gallons for each additional fish