Koi Tategoi Selection Criteria Guide: Body Skin and Pattern
Tategoi means “future fish” — a koi that has not yet reached its potential but shows the markers that suggest it will. The koi tategoi selection process is what separates a SGD 200 fish from a SGD 50,000 show winner three years later. Tategoi selection is part science, part trained eye, and serious Niigata buyers fly to Singapore importers when good young fish arrive on auction. This guide from Gensou Aquascaping at 5 Everton Park breaks down the four pillars of selection: body, skin, pattern, and bloodline.
Body Conformation (Futuran)
Body shape carries the most weight in tategoi assessment. Look for a powerful shoulder line, balanced volume from head to caudal peduncle, and a slightly tapering tail base. The female form (rounded shoulders, broader belly) signals jumbo growth potential. Avoid pinched shoulders, hollow bellies, or curved spines. View the fish from above in a shallow tub — the dorsal silhouette tells the truth. Body shape matures through age 4-5; early indicators visible at 25-30 cm.
Skin Quality (Hada)
Skin is the surface luster, scale arrangement, and underlying tone. Top tategoi show a deep oil-glossy luster (not just glare on the surface) that suggests cellular health. Examine scale arrangement for uniformity — missing or out-of-line scales penalise heavily. The white shiroji must be milky-clean, not yellow-tinged, and the hi (red) must show vibrant orange-red core, not patchy lipstick gloss. Skin quality is partly genetic (bloodline) and partly water-quality dependent.
Pattern Balance and Kiwa
Pattern criteria vary by variety. Kohaku targets balanced hi distribution in 3-5 plates, no single huge plate dominating. Sanke and Showa add sumi placement rules. Across all varieties, kiwa (the edge between hi and shiroji) must be sharp and clean — fuzzy or pixellated kiwa fails. Sashi (the leading edge of a hi plate as it advances) shows the colour’s stability over time. Read pattern thinking three years forward: a young hi plate often shrinks slightly with age, so over-coverage at year one usually balances at year three.
Head Pattern
Head markings carry disproportionate weight. A solid hi crown (head pattern reaching from snout to between eyes) anchors the koi visually. Avoid hi that bleeds into the eyes (menpe) or onto the gill covers. Sumi on the head is acceptable in showa and utsuri but not in kohaku. The face is the first thing judges look at — strong head pattern alone elevates an otherwise average body.
Bloodline (Kettou)
Bloodline matters because predictable genetic outcomes anchor the pricing. Sakai Fish Farm, Dainichi, Marudo, Marusei, Hirasawa, Momotaro and Ogata are the names that drive premium values. Documented bloodline (with breeder paperwork) doubles the resale value of equivalent-quality unmarked fish. Singapore importers list bloodline at point of sale. Stock from premium bloodlines as tategoi at SGD 800-5000 for 25-30 cm fish.
Tools and Viewing Conditions
Always view tategoi candidates in a shallow viewing tub (30-40 cm depth) under natural overhead light. Indoor LED lighting distorts metallic luster and dulls hi tones. Bring a measuring tape — body length matters. A polarising hand lens reveals scale alignment. Treat new arrivals with conditioner from the water care and treatment shelf during inspection sessions.
Common Selection Mistakes
Beginners over-focus on pattern and ignore body. A flashy pattern on a poor body fails competition entry by year three. Beginners also buy at peak hi saturation, not realising hi often fades in the first 12 months post-purchase. Conservative selection rewards body, skin, and bloodline first; pattern second. Use feed from the fish food and feeding range rated for show development to support tategoi growth.
Singapore Importer Auctions
Yamamatsu Singapore, Marudo Carp Farm imports, and Shintaro Carp distributors run periodic tategoi auctions where buyers from across Southeast Asia compete for premium young fish. Auction tategoi from established bloodlines start at SGD 1500 and routinely reach SGD 30,000 for outstanding individuals. Photograph and tag every purchase — tategoi appreciate substantially when matured well, and provenance documentation drives the resale.
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