Evidence classification
All product-specific statements below are MANUFACTURER CLAIM ONLY unless separately corroborated. They are useful primary formulation/feeding evidence, but are not sufficient to call any product or brand “best.”
Medaka no Mai Complete (メダカの舞 コンプリート)
Primary manufacturer: Kyorin Co., Ltd. / Hikari, Japan.
Intended stage: young Medaka from about 2.5 cm through development toward broodstock.
Manufacturer feeding direction: feed several times per day, adjusting for water temperature, in an amount consumed within roughly 2–3 minutes per feeding.
Medaka Baby Hyper Growth (メダカベビー ハイパー育成)
Primary manufacturer: Kyorin Co., Ltd. / Hikari, Japan.
Manufacturer feeding direction: newly hatched fry initially rely on the yolk sac; begin external feeding after yolk-sac absorption / mouth opening, stated as about 3–4 days after hatching. Feed very small amounts while floating, ideally 5+ times daily.
Guaranteed analysis reported by manufacturer: crude protein >=48%, crude fat >=12%, crude fiber <=3%, moisture <=10%, ash <=15%, phosphorus >=1%.
Medaka spawning/breeding feed (メダカのエサ 産卵繁殖用)
Primary manufacturer: Kyorin Co., Ltd. / Hikari, Japan.
Manufacturer feeding direction: enough to be eaten immediately, at least 2–3 feedings per day; manufacturer specifically states that smaller, more frequent feedings are favorable for spawning output. Granule size is listed as 0.38–0.6 mm and is considered too large for newly hatched fry unless crushed.
Listed ingredients include fish meal, squid meal, krill meal, egg-yolk powder, starches, fish oil, nori, egg-white powder, gluten meal, brewer’s yeast, seaweed meal, silkworm meal, marigold extract, spirulina, alfalfa meal, methionine, carotenoids, probiotic preparation, garlic, vitamins and minerals.
Regional-practice interpretation
This is Japanese manufacturer guidance, not evidence that Japanese breeders generally use these products. Do not promote it to STRONG BREEDER CONSENSUS until breeder/farm usage is independently documented.
Open research queue
1. Independent peer-reviewed or university evidence for Medaka/Oryzias larval and broodstock protein/lipid requirements.
2. Japanese breeder/farm interviews or primary social posts documenting actual use of Otohime, Hikari/Kyorin, live Artemia, daphnia/moina, green water, paramecia, or other feeds.
3. Otohime manufacturer formulation/particle-size evidence and intended aquaculture stages.
Medaka Pros Spawning/Breeding (メダカプロス 産卵繁殖)
Primary manufacturer: Kyorin Co., Ltd. / Hikari, Japan.
Manufacturer feeding direction: several feedings per day, each limited to what the fish consume in about 2–3 minutes.
Guaranteed analysis on the current manufacturer page: protein >=48%, fat >=11%, crude fiber <=3.0%, moisture <=10%, ash <=15%, phosphorus >=1.0%.
Public research references
Listed research leads are not automatically supporting evidence for every individual claim.
No eligible public supporting URLs are attached to this summary yet.