How difficult is it to keep Telescope Ranchu?

Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.

What is the ideal temperature for Telescope Ranchu?

The ideal temperature for Telescope Ranchu is 15〜28℃. Avoid sudden temperature changes and maintain a stable environment.

What is the lifespan of Telescope Ranchu?

The average lifespan of Telescope Ranchu is 10-15 years. With proper care and nutrition, they can live a long and healthy life.

What should I feed Telescope Ranchu?

Telescope Ranchu feeds on: Prepared foods, frozen bloodworms. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Telescope Ranchu?

The price of Telescope Ranchu varies significantly depending on variety, size, and individual quality. Check our market price page for the latest pricing information.

AI-generated image

Telescope Ranchu

Advanced

Carassius auratus

A goldfish pairing the dorsal-less ranchu body with the protruding eyes of a telescope. Head growth and projecting eyes develop together, so the fish needs careful handling.

Difficulty

Advanced

Temperature

15〜28℃

Lifespan

10-15 years

Diet

Prepared foods, frozen bloodworms

About

The telescope ranchu pairs the dorsal-less ranchu body with the protruding eyes of a telescope goldfish. The ranchu was refined from the wakin by way of the maruko, which lacked both dorsal fin and head growth, reaching its present form after the Meiji era; it grows to about 15cm and standardly carries a three-lobed, four-lobed or sakura tail. The telescope eye traces back to the red telescope: the eyes do not project at hatching but begin to swell from a few months of age. Because the two traits combine, the fish is both a weak swimmer and easily injured about the eyes. Goldfish joining telescope eyes to the ranchu body have long been made in China, and one account holds that the celestial eye arose when such a fish's eyes turned upward.

Source: Wikipedia (CC BY-SA 4.0)

Lifespan of the Telescope Ranchu

The Telescope Ranchu lives 10-15 years.

Temperature & humidity for the Telescope Ranchu

The ideal temperature for the Telescope Ranchu is 15〜28℃.

Basic Info

Origin

China and Japan

Lifespan

10-15 years

Temperature

15〜28℃

Diet

Prepared foods, frozen bloodworms

Care Specifications

pH: 6–8
Hardness (GH): 5–19 dGH
Water Temp.: 15–28℃

PeacefulGroupBreeding: Hard

Sources: FishBase (Carassius auratus) / Keihan Nishikigoi Center: goldfish water management / Kingyo Hitosuji: Ranchu

Morphs (Varieties)

Goldfish varieties arose from fixed mutations and selective breeding, and body form, tail form, scale type, colour and head growth are all carried forward by selection over generations. Inheritance is therefore shown as line-bred throughout rather than split into dominant and recessive.

Line-bredEstablished by selective line breeding.

Ranchu body form (dorsal-less)Telescope eyeHead growth (wen)

Sources: Kingyo Hitosuji: Ranchu

A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.