Goldfish produce a lot of waste, so anything in the substrate will eventually suffocate or be destroyed by the water (nitrate, ammonia). You also want to leave the bottom-dwellers alone. These are all great choices if you plan on getting a larger aquarium or can maintain 2 different tanks for each type of fish you have/want. So this includes guppies, mollies, platys, tetras, etc. Generally, anything small enough to fit in your fish's mouth will be considered food. It depends on the tank size and water temperature. The Bubble Eye has googly-eyes and is exactly what it sounds like: It's an eye with a bubble under it. It's surrounded by a large black 'mask' above the eyes. It has a large hump on its back just behind the head, which you can only see when it flares out its tail fins.Ī Chinese Goldfish or Black Moor will generally have a longer body with short stubby fins and an upturned mouth (like the one in the picture). Because of this, they're called the 'fantail.' They have two very large tail fins that droop down and curve back under to create a teardrop shape.

Tank needs to be at least 10 gallons for 1 goldfish.įantail goldfish are the most popular types of goldfish.

All fish need places to hide and rest safely.

Last but not least, you don't want to overcrowd the tank.

Cannot live in a substrate (gravel/sand).

Can't live at a temperature too far below that of your aquarium unless you're willing to provide an external heater just for the tank.

Will likely require their own tank for one or two of the same species/breed.

This can be achieved with reverse osmosis or bottled water. Soft, acidic water conditions are recommended.The largest goldfish on record is 22 inches long and was caught in China in the year 2000. You can even train them to eat out of your hand.

They can be taught to do special tricks, like swimming through hoops or pushing balls into a net. Goldfish are actually very smart, and they're constantly learning new things. There are some breeds of goldfish that can grow up to 12 inches, but most stay smaller due to the overfeeding of people who don't know any better (or don't care).

These fish are very hardy and long-lived, provided they're well cared for by their owner.

Goldfish tank size