How difficult is it to keep Butterfly Telescope?

Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.

What is the ideal temperature for Butterfly Telescope?

The ideal temperature for Butterfly Telescope is 18〜23℃. Avoid sudden temperature changes and maintain a stable environment.

What is the lifespan of Butterfly Telescope?

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

How large does Butterfly Telescope get?

Butterfly Telescope typically reaches 10-18cm as an adult. Size may vary depending on care conditions and individual genetics.

What should I feed Butterfly Telescope?

Butterfly Telescope feeds on: Pellets, Bloodworms. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Butterfly Telescope?

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

Source: Wikimedia Commons

Butterfly Telescope

Intermediate

A telescope eye goldfish with butterfly-wing spread tail. Top-view tail shape is main viewing point.

Difficulty

Intermediate

Temperature

5〜30℃

Lifespan

10-15 years

Size

10-18cm

Diet

Pellets, Bloodworms

About

The Telescope Butterfly (Butterfly Tail Demekin) pairs the Telescope goldfish's large, protruding eyes with the distinctive butterfly-spread tail fin, creating a uniquely striking variety best appreciated from directly above. The tail spreads horizontally and curves upward at the edges, forming an elegant butterfly wing silhouette in top view. Shallow tanks or basins designed for overhead observation are strongly preferred for this breed. Black individuals, sometimes called Black Butterfly Demekin, are among the most popular variants, alongside calico, panda (black-and-white), and sarasa forms. Like all Telescope varieties, the prominent eyes are fragile—sharp aquarium decorations and abrasive substrates must be avoided, and filter intakes require sponge protection.

Lifespan of the Butterfly Telescope

The Butterfly Telescope lives 10-15 years.

Size of the Butterfly Telescope

The Butterfly Telescope grows to 10-18cm.

Temperature & humidity for the Butterfly Telescope

The ideal water temperature for the Butterfly Telescope is 18〜23℃.

Butterfly Telescope goldfish are docile and slow-swimming, requiring similarly paced tankmates and stable water conditions at 18–25°C.

Basic Info

Origin

China

Lifespan

10-15 years

Size

Care Specifications

pH: 6–8
Hardness (GH): 5–19 dGH
Water Temp.: 18–23℃

PeacefulGroupBreeding: Moderate

Sources: FishBase / Aqueon Goldfish Care Guide

Morphs (Varieties)

Goldfish varieties are line-bred for body shape, tail type, scale type, and coloration. Traits such as protruding eyes, transparent scales (calico), and albinism are single-locus traits.

RecessiveVisual only with two copies; one copy = het (carrier).

Protruding (telescope) eyes

Line-bredEstablished by selective line breeding.

Deep body / dorsal humpButterfly tail

Sources: Wikipedia - Goldfish (Varieties) / Goldfish — Wikipedia (Japanese edition, varieties)

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

References & Sources

Edited & verified by: BreederDirect editorial team

The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.

Primary sources

Taxonomy & Authority

Accepted name: (Linnaeus, 1758)

Synonyms: Cyprinus auratus Linnaeus, 1758, Carassius auratus auratus (Linnaeus, 1758), Cyprinus thoracatus Valenciennes, 1842, Carassius burgeri Temminck & Schlegel, 1846, Cyprinus chinensis Gronow, 1854

Authority databases: FishBase · GBIF · FishBase: Carassius auratus · GBIF: Carassius auratus

Nomenclature follows global taxonomic authority databases.