Goldfish may be kept in an uheated fresh-water aquarium. They are considered ill-suited to live in a heated tropical fish tank, as they are used to the greater amount of oxygen in unheated tanks.
No. Goldfish are freshwater fish and tropical starfish are saltwater fish.
Goldfish are not a tropical fish. In addition, they are egg bearing rather than live birth.
shouldn't be a problem because they live in both
A goldfish is a cold water fish, so it does best when it is in cooler water. Any goldfish forced to live in a tropical fish setting will probably live, just like you can live outside when it's very hot in the summer, but it will not be the healthiest, happiest goldfish it can be, just like you would rather be in the air conditioning.
None, goldfish are cold water fish, so having a tropical fish as a tank-mate just wouldn't work because tropical fish need to live in warm water.
If the goldfish is a fancy variety, it can live alone in a 20 gallon tank. Goldfish do not belong in tanks any smaller than this as they grow very large
Goldfish are meant to live in cold water, not the warm water in a tropical aquarium. This is a huge reason why goldfish and tropicals shouldn't be in the same tank.
they are found in collection tanks around the world but originally found in China
no
No goldfish would prefer to have a lower temperature than any type of tropical fish, however some goldfish can withstand higher temperature if they are slowly acclimated to it! But in the long run goldfish would be happy with other goldfish and tropical fish with tropical fish... there is a reason you don't see the goldfish with the tropical fish in a good aquatic store.
A swordtail is a tropical fish and a goldfish is not. The swordtail would need a higher temp. than the goldfish. Depending on where you live it probably wouldn't survive the winter.