Ryukin Goldfish: The Hump-Backed Aristocrat

In this guide

Overview

The ryukin is a Japanese fancy goldfish variety recognisable by the pronounced hump just behind its head, giving it a taller, more angular profile than the fantail it is often compared to. It grows to around fifteen to eighteen centimetres and carries a long, flowing double tail.

Colour forms commonly seen in India include red and white, solid orange, and calico, with the long-finned versions especially popular in specialist shops.

Tank requirements

A single ryukin needs at least seventy five litres, more for a small group. The pronounced back hump does not affect swimming ability much, and ryukins are actually reasonably active swimmers for a fancy goldfish variety, so they appreciate a bit more open space than a bubble eye or lionhead would need.

Coldwater by nature, ryukins do not need heating anywhere in India and are comfortable at typical room temperature, doing especially well in the cooler months and in northern and hill station climates.

Diet and care

A varied diet of goldfish pellets, blanched vegetables and occasional live or frozen food supports the ryukin's growth and colour. As with most fancy goldfish, soaking dry pellets before feeding reduces the risk of swim bladder trouble.

Good filtration and weekly partial water changes matter more here than tank decor, since ryukins are hardy but still sensitive to poor water quality over time.

Buying tips

• Priced from around one hundred to three hundred rupees for younger fish in most Indian shops
• Long-finned ryukins command a premium over the short-finned standard form
• Choose fish with a symmetrical hump and no visible curve or kink in the spine, which can indicate poor breeding

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