Fantail Goldfish (Carassius auratus)
Native Location: Asia
Size: 15 – 20cm (6 – 8 inches)
Temperature Range: 18 – 21℃ (65 – 70℉)
Preferred pH Range: 6.5 – 7.5
Minimum Aquarium Size: 200L (50 gallons)
Potential Tankmates: Other fancy Goldfish
Care Level: Easy - Intermediate
Adore Fantails for their long flowing fin. These gorgeous fish are great freshwater fish for beginners and experienced hobbyists. But Fantails do have some distinct care requirements.
Fantails will consume anything they can get a hold of, however, they have been known as tricky to feed. Fantails tend to develop digestive problems. Their diets will need adjustment in consideration. It is best to stick to high-quality foods packed with nutrition. Instead of dry flakes or pellets, feed Fantails live or frozen foods like bloodworms, as they have more nutrition. You can also try high-fibre snacks of lettuce, blanched peas and zucchini. A general rule is to feed them two times a day, with the amount of food they can consume in two minutes. Finding tankmates for these fellas can be tricky, as they are so peaceful and have long fins, they can become the target of bullies. Avoid any fish with the slightest hints of aggression. Anything that swims faster or nips fins are not suitable either.
Fantails will enjoy the water with some movement to it, like a river stream. Use a soft sand substrate as they are likely to dig, and this will help avoid injuries. Add smooth rocks and driftwood for décor. You can try floating plants like hornwort or other vegetation such as Java Fern and Anubis. Fantails can be large, but they are not powerful swimmers and less active than others in the Goldfish family tree. If you want to keep multiple Fantails in a tank, there will need to be enough room for all of them, a minimum of 37 - 75 L (10 – 20 gallons) but an ideal 113L (30 gallons) per fish! That is a lot of water. Consider setting them up in a pond.
Fantails bodies are egg-shaped, an unusual trait compared to the common Goldfish breeds with slim torpedo-shaped bodies. Breeding Fantails can be straightforward, but you will need a separate breeding tank with pristine conditions. Include fine-leafed plants, spawning mops or smooth rocks to give the eggs something to stick on. Males will start chasing females around in spring. When the female is ready, she will lay thousands of eggs and the male will fertilize them. You will have to separate the eggs from the mature fish.