Cyprinidaefreshwater fishintermediate

Osaka Ranchu Goldfish

Carassius auratus

Origin: Captive bred

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Water Parameters

Temperature1022 °C
15 °C35 °C
pH78
49
GH (Hardness)515 °dGH
0 °dGH30 °dGH
KH (Alkalinity)38 °dKH
0 °dKH20 °dKH

Quick Stats

Max Size
20 cm
Min Tank
150 L
Lifespan
10-15
Swimming Level
mid
Schooling
No
Diet
Omnivore; sinking goldfish pellets, vegetables, gel foods
Temperament
Peaceful; slow-moving fancy goldfish

About

The Osaka Ranchu is an extraordinarily rare goldfish variety once thought extinct, recently revived by dedicated Japanese breeders who preserved the original strain. It differs from the standard Ranchu by having a longer, more cylindrical body and a distinctive broad, forked tail—characteristics lost when the original Osaka line disappeared. Considered one of the rarest goldfish varieties available on the world market, it represents a true collector's specimen.

Care Guide

Provide a large, heavily filtered aquarium with frequent water changes. Maintain cool, clean, well-oxygenated water. Feed quality sinking goldfish foods. Source from reputable specialist importers only. House with other slow-moving fancy goldfish.

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