{"product_id":"red-white-ryukin-carassius-auratus","title":"Red \u0026 White Ryukin | Carassius auratus","description":"\u003ch2\u003eDescription\u003c\/h2\u003e \u003cp\u003eThe Ryukin is one of the most robust and rewarding of the fancy goldfish, instantly recognisable by its high, humped back, deep egg-shaped body and long, flowing tail. This red-and-white form pairs bold orange-red with clean white for a classic, eye-catching look. A hardy coldwater centrepiece, it can reach around 15–20 cm and lives for many years in a spacious, well-filtered tank.\u003c\/p\u003e \u003ch2\u003eNatural Habitat\u003c\/h2\u003e \u003cp\u003eCarassius auratus is a domesticated form of a hardy East Asian carp, and fancy varieties like this one exist only in aquaria and ponds. Wild goldfish inhabit slow, cool, weedy waters, so they appreciate a spacious tank or pond with gentle flow, robust filtration and cool, well-oxygenated water rather than tropical heat.\u003c\/p\u003e \u003ch2\u003eAppearance\u003c\/h2\u003e \u003cp\u003eA deep, short-bodied fancy with a distinctive pointed hump rising behind the head, giving it a taller silhouette than a fantail. It carries a long, forked, flowing tail and paired anal fins. This variety shows a crisp red-and-white pattern; colour and marking vary from fish to fish, so each is an individual.\u003c\/p\u003e \u003ch2\u003eTemperament and Compatibility\u003c\/h2\u003e \u003cp\u003ePeaceful and sociable, happiest in the company of other goldfish. The Ryukin is a sturdier, slightly faster fancy than the daintier telescope and bubble-eye types, but it is still a slow, round-bodied fish that should not compete with fast single-tails. Keep a small group for the best display.\u003c\/p\u003e \u003ch2\u003eFeeding\u003c\/h2\u003e \u003cp\u003eAn omnivore with a big appetite. Feed a quality goldfish pellet or gel food as the staple, supplemented with blanched vegetables, and occasional frozen bloodworm, brine shrimp or daphnia. Soaking dry foods before feeding helps prevent the swim-bladder and buoyancy troubles that round-bodied fancies are prone to. Feed small amounts and never overfeed this heavy waste producer.\u003c\/p\u003e \u003ch2\u003eCare Requirements\u003c\/h2\u003e \u003cp\u003eProvide a minimum of around 75 L for one fish and add roughly 40–50 L for each additional goldfish, as they are large, long-lived and messy. Keep the water cool at 18–23 °C — no heater is usually needed — with strong filtration, gentle flow and regular water changes. A pH of 7.0–8.0 and moderately hard water suit them well.\u003c\/p\u003e \u003ch2\u003eBreeding\u003c\/h2\u003e \u003cp\u003eGoldfish are egg-scatterers that spawn in spring as water warms, chasing among fine-leaved plants or spawning mops where the sticky eggs are laid and abandoned. Sexing is difficult outside the breeding season, when males develop small white tubercles on the gill covers and pectoral fins. Fry are easy to raise but the varied fancy forms rarely come true to type.\u003c\/p\u003e \u003ch2\u003eSpecies Information\u003c\/h2\u003e \u003ctable\u003e \u003ctr\u003e\n\u003ctd\u003eScientific Name\u003c\/td\u003e\n\u003ctd\u003eCarassius auratus\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eCommon Name\u003c\/td\u003e\n\u003ctd\u003eRyukin Goldfish\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDomesticated (ornamental form; wild ancestor from East Asia)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMaximum Size\u003c\/td\u003e\n\u003ctd\u003eAround 15–20 cm\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eLifespan\u003c\/td\u003e\n\u003ctd\u003e10–20 years with good care\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eTemperament\u003c\/td\u003e\n\u003ctd\u003ePeaceful\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDifficulty\u003c\/td\u003e\n\u003ctd\u003eBeginner\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eMinimum Tank Size\u003c\/td\u003e\n\u003ctd\u003e75 L\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eRecommended Tank Size\u003c\/td\u003e\n\u003ctd\u003e150 L or larger for a group\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDiet\u003c\/td\u003e\n\u003ctd\u003eOmnivore: goldfish pellets, gel foods, vegetables, frozen foods\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eWater Temperature\u003c\/td\u003e\n\u003ctd\u003e18–23 °C (coldwater)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003epH Range\u003c\/td\u003e\n\u003ctd\u003e7.0–8.0\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eGH Range\u003c\/td\u003e\n\u003ctd\u003eModerately hard to hard, around 8–20 dGH\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSalinity\u003c\/td\u003e\n\u003ctd\u003eNot applicable (freshwater)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSuitable For\u003c\/td\u003e\n\u003ctd\u003eLarge, cool, well-filtered aquariums or ponds\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eReef Safe\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003ePlant Safe\u003c\/td\u003e\n\u003ctd\u003eNo (goldfish nibble, dig and uproot soft plants)\u003c\/td\u003e\n\u003c\/tr\u003e \u003c\/table\u003e \u003ch2\u003eSuitable Tank Mates\u003c\/h2\u003e \u003cp\u003eBest kept with other goldfish of similar type and swimming speed. Slow, round-bodied fancies mix best with other fancies (fantails, orandas, ryukins, moors), while faster single-tails suit comets and shubunkins. White cloud mountain minnows and hillstream loaches are cool-water companions in larger set-ups.\u003c\/p\u003e \u003ch2\u003eAvoid Keeping With\u003c\/h2\u003e \u003cp\u003eAvoid tropical community fish that need warmth, nippy species such as barbs and tiger barbs that pull at flowing fins, and any fish small enough to be swallowed. Fast single-tailed goldfish will out-compete slow fancies for food, so avoid mixing the two body types.\u003c\/p\u003e","brand":"Nick's Aquarium Oceanarium Terrarium","offers":[{"title":"Small (1-5cm)","offer_id":55232823558435,"sku":"AA3746","price":29.95,"currency_code":"AUD","in_stock":false},{"title":"Medium (5-10cm)","offer_id":55232823591203,"sku":"AA3746-M","price":34.95,"currency_code":"AUD","in_stock":false},{"title":"Large (10-15cm)","offer_id":55232823623971,"sku":"AA3746-L","price":39.95,"currency_code":"AUD","in_stock":false},{"title":"X-Large (15-18cm)","offer_id":55351969775907,"sku":"AA3746-XL","price":44.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-white-ryukin-carassius-a-43091450724643-lv.webp?v=1790307726","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-white-ryukin-carassius-auratus","provider":"Nicks AOT","version":"1.0","type":"link"}