{"product_id":"calico-ryukin-carassius-auratus","title":"Calico Ryukin | Carassius auratus","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe Calico Ryukin is a showy twin-tail fancy with a dramatic high, humped back and a deep, rounded body, dressed here in watercolour blues, reds and blacks. Hardy, bold for a fancy and full of character, it is a rewarding coldwater centrepiece. Adults reach around 15–18cm and can be quite chunky.\u003c\/p\u003e\n\u003ch2\u003eNatural Habitat\u003c\/h2\u003e\n\u003cp\u003eThe Ryukin is a domesticated form of Carassius auratus, a hardy East Asian cyprinid, developed via Japan (its name references the Ryukyu Islands). It exists only in captivity. Keep it in cool, clean, well-filtered water in a large aquarium or pond.\u003c\/p\u003e\n\u003ch2\u003eAppearance\u003c\/h2\u003e\n\u003cp\u003eInstantly recognisable by the tall shoulder hump rising behind the head and a short, deep body ending in flowing double fins. The calico version is a nacreous patchwork of blue-grey, red, orange, black and white, unique to each fish. It is a robust, energetic swimmer by fancy standards.\u003c\/p\u003e\n\u003ch2\u003eTemperament and Compatibility\u003c\/h2\u003e\n\u003cp\u003ePeaceful but relatively active and a keen eater, so it can outcompete slower fancies like Ranchu or bubble-eyes. Best kept with Ryukins, Fantails, Orandas and other similarly capable fancy goldfish.\u003c\/p\u003e\n\u003ch2\u003eFeeding\u003c\/h2\u003e\n\u003cp\u003eAn omnivore with a hearty appetite. Feed a sinking goldfish pellet or gel food as the staple, plus blanched vegetables and occasional frozen treats. Sinking foods help avoid buoyancy problems in its deep body. Take care not to overfeed.\u003c\/p\u003e\n\u003ch2\u003eCare Requirements\u003c\/h2\u003e\n\u003cp\u003eProvide a large, cool (18–24°C), heavily filtered tank with ample surface area; goldfish are messy and need frequent water changes to keep ammonia and nitrate low. No heater is required. Smooth décor protects the flowing fins.\u003c\/p\u003e\n\u003ch2\u003eBreeding\u003c\/h2\u003e\n\u003cp\u003eEgg-scatterers that spawn in spring as water warms, laying adhesive eggs over plants and surfaces. They give no parental care and will eat their eggs, so a dedicated tank and ongoing selection are needed to raise quality fry.\u003c\/p\u003e\n\u003ch2\u003eSpecies Information\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eScientific Name\u003c\/td\u003e\n\u003ctd\u003eCarassius auratus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Name\u003c\/td\u003e\n\u003ctd\u003eCalico Ryukin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eEast Asia \/ Japan (domesticated fancy strain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Size\u003c\/td\u003e\n\u003ctd\u003eAround 15–18cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifespan\u003c\/td\u003e\n\u003ctd\u003e10–15 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperament\u003c\/td\u003e\n\u003ctd\u003ePeaceful (slow)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifficulty\u003c\/td\u003e\n\u003ctd\u003eBeginner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Tank Size\u003c\/td\u003e\n\u003ctd\u003e75 litres for one, plus ~40 litres per extra fish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Tank Size\u003c\/td\u003e\n\u003ctd\u003e110 litres or more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiet\u003c\/td\u003e\n\u003ctd\u003eOmnivore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Temperature\u003c\/td\u003e\n\u003ctd\u003e18–24°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Range\u003c\/td\u003e\n\u003ctd\u003e7.0–8.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGH Range\u003c\/td\u003e\n\u003ctd\u003e8–20 dGH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSalinity\u003c\/td\u003e\n\u003ctd\u003eNot applicable (freshwater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable For\u003c\/td\u003e\n\u003ctd\u003eColdwater fancy goldfish tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReef Safe\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlant Safe\u003c\/td\u003e\n\u003ctd\u003eNo (nibbles and uproots soft plants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eSuitable Tank Mates\u003c\/h2\u003e\n\u003cp\u003eOther fancy goldfish of similar body type and swimming speed, such as Fantails, Orandas and other Ryukins.\u003c\/p\u003e\n\u003ch2\u003eAvoid Keeping With\u003c\/h2\u003e\n\u003cp\u003eFast single-tail goldfish, very slow fancies it may out-eat, tropical community fish, fin-nippers, and warm-water species.\u003c\/p\u003e","brand":"Nick's Aquarium Oceanarium Terrarium","offers":[{"title":"Small (1-5cm)","offer_id":55232821428515,"sku":"AA1386","price":20.95,"currency_code":"AUD","in_stock":false},{"title":"Medium (5-10cm)","offer_id":55232821461283,"sku":"AA1386-M","price":25.95,"currency_code":"AUD","in_stock":false},{"title":"Large (10-15cm)","offer_id":55232821494051,"sku":"AA1386-L","price":30.95,"currency_code":"AUD","in_stock":false},{"title":"X-Large (15-18cm)","offer_id":55351969415459,"sku":"AA1386-XL","price":35.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/calico-ryukin-carassius-aura-43091449807139-lv.webp?v=1790307187","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/calico-ryukin-carassius-auratus","provider":"Nicks AOT","version":"1.0","type":"link"}