Ranchu Goldfish - Tips and Characteristics

Quick Statistics - Ranchu
Country of Origin: Japan
Family: Cyprinidae
Scientific Name: Carassius auratus
Environment: Freshwater fish
Temperature: 65° - 78°F
Type: Twin Tail
Diet: Omnivore
Food: Pellets, flakes, live food, veggies and fruit
Adult Size: 5-8" (inches)
Lifespan: 10-15 years or more
Care Level: Medium
Temperament: Friendly and social

You've probably heard of the Ranchu, but you never guessed it's the 'king of goldfish'. Also known to be highly regarded in Japan and China, impressive viewed from either direction, it's from above where you can see their broad back.

The Ranchu goldfish resembles much like the Lionhead goldfish, but Ranchus have more arched backs and have much shorter tails that are turned-in at a sharp angle. Like the Lionhead, they lack a dorsal fin and will develop fleshy 'raspberry' like head growth. It's tail fin splays out to the sides, almost horizontal and may have tree or four lobes.

Ranchu has a short egg-shaped body, except his highly curved back, other distinctive feature is its head. Available in a variety of colors, the most common are the gold-and-white, red-and-white and calico. They can also be completely black, like the Black Moor or white.

It will eat almost anything you feed it. They love varied diets including fresh food like veggies or fruit and also frozen food or flakes. The hard growth may take at least one year to develop.

The average lifespan is 10-15 years and the Ranchu can reach about 5-8 inches long. The deep belly is 3/4 the length of the fish.

Credits to Gio

You also need to know...

Ranchu is one of the delicate goldfish varieties. It's not a fast swimmer and so it can't compete for food with single tails like Comet, Common and Shubunkins. If kept with other slow-moving varieties the Ranchu should get plenty of food and do very well.


The best tank mates for Ranchu are other twin-tailed goldfish like the Oranda, Fantail, Black Moor, Veiltail, Lionchu or Ryukin. Do not mix with single-tails.

Love to you,

Image credits to: Hector Cabrera @ Flickr.com