Taniguchi Gin Rin Hajiro Male Tosai Koi

Taniguchi Gin Rin Hajiro Tosai listed as male, approximately 24 cm. Expect a dark Hajiro-style fish with pale fin tips and Gin Rin reflective scaling, although the exact distribution of dark colour, white edging and sparkle depends on the individual. The sex is based on the supplier listing, not a fresh examination by Glass & Gill.

Supplier code: KN26-25  |  Listed size: 24 cm

What to look for in this Koi

Male Koi can develop a more athletic silhouette than females, but age and feeding are major factors; don’t use body shape alone to certify sex. When inspecting this variety, check that the fins are intact and the bright scale effect remains visible across the back rather than relying on a heavily processed photograph.

Pond requirements and day-to-day care

Species: Japanese ornamental Koi (Cyprinus carpio). These are social, long-lived pond fish that can exceed 60 cm, with some growing considerably larger. Keep with suitably sized Koi rather than in small indoor aquariums. Provide substantial swimming volume, strong biological and mechanical filtration, aeration, shade and protection from predators. Actual pond volume depends on adult stocking density and filtration; allow several thousand litres for a small group and plan for growth.

Water: Aim for stable, well-oxygenated water around 15–25°C, pH roughly 7.0–8.5, and zero measurable ammonia and nitrite. Koi tolerate seasonal temperature variation if changes are gradual, but heat, low oxygen and abrupt shifts are dangerous. Test water routinely and perform sensible partial water changes using dechlorinated water.

Feeding: Offer a reputable Koi pellet suited to fish size and water temperature. Feed only what is eaten promptly; reduce feeding as the water cools and follow temperature-specific food guidance. Uneaten food and aggressive growth feeding increase water pollution.

Introducing your fish: Arrange suitable live-fish transport before ordering. Have a separate observation/quarantine system ready, compare transport and pond conditions, and acclimate carefully without adding transport water to the pond. Monitor the fish before mixing it with established stock.

Choosing and receiving your Koi

Illustrative image: The image is AI-generated to explain the advertised type; it is not a photograph of the fish offered. Pattern, colouring, body shape, sex and exact measured length may vary. Request current photos/video and supplier confirmation for individually priced specimens before purchase.

Availability: Supplier availability is subject to individual selection, confirmation and transport suitability. Large Koi may require specialist collection or quoted transport rather than standard livestock courier pricing.