{"product_id":"australian-rainbowfish-melanotaenia-fluviatilis","title":"Australian Rainbowfish (Melanotaenia fluviatilis)","description":"\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"88057bb9-0e99-4713-9d13-e00fae5eb4c8\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2-thinking\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cp data-start=\"56\" data-end=\"421\"\u003eThe \u003cstrong data-start=\"60\" data-end=\"86\"\u003eAustralian Rainbowfish\u003c\/strong\u003e (\u003cem data-start=\"88\" data-end=\"114\"\u003eMelanotaenia fluviatilis\u003c\/em\u003e) is a hardy, peaceful rainbowfish native to Australia, valued for its active schooling behavior and subtle \u003cstrong data-start=\"222\" data-end=\"245\"\u003esilver-blue shimmer\u003c\/strong\u003e with colorful fins that intensify as the fish matures. It’s an excellent choice for community aquariums, especially in larger planted tanks with plenty of open swimming space.\u003c\/p\u003e\n\u003ch3 data-start=\"423\" data-end=\"440\"\u003eAquarium Care\u003c\/h3\u003e\n\u003cp data-start=\"441\" data-end=\"467\"\u003e\u003cstrong data-start=\"441\" data-end=\"455\"\u003eTank size:\u003c\/strong\u003e 40 gallons+\u003c\/p\u003e\n\u003cp data-start=\"469\" data-end=\"490\"\u003e\u003cstrong data-start=\"469\" data-end=\"490\"\u003eWater parameters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"491\" data-end=\"587\"\u003e\n\u003cli data-start=\"491\" data-end=\"529\"\u003e\n\u003cp data-start=\"493\" data-end=\"529\"\u003e\u003cstrong data-start=\"493\" data-end=\"509\"\u003eTemperature:\u003c\/strong\u003e 24–28 °C (75–82 °F)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"530\" data-end=\"547\"\u003e\n\u003cp data-start=\"532\" data-end=\"547\"\u003e\u003cstrong data-start=\"532\" data-end=\"539\"\u003epH:\u003c\/strong\u003e 7.0–8.0\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"548\" data-end=\"587\"\u003e\n\u003cp data-start=\"550\" data-end=\"587\"\u003e\u003cstrong data-start=\"550\" data-end=\"563\"\u003eHardness:\u003c\/strong\u003e soft to moderately hard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"589\" data-end=\"609\"\u003e\u003cstrong data-start=\"589\" data-end=\"609\"\u003eSocial behavior:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"610\" data-end=\"704\"\u003e\n\u003cli data-start=\"610\" data-end=\"638\"\u003e\n\u003cp data-start=\"612\" data-end=\"638\"\u003ePeaceful, schooling fish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"639\" data-end=\"704\"\u003e\n\u003cp data-start=\"641\" data-end=\"704\"\u003eKeep in groups of \u003cstrong data-start=\"659\" data-end=\"668\"\u003e6–10+\u003c\/strong\u003e (male-heavy groups show best color)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"706\" data-end=\"720\"\u003e\u003cstrong data-start=\"706\" data-end=\"720\"\u003eTankmates:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"721\" data-end=\"796\"\u003e\n\u003cli data-start=\"721\" data-end=\"740\"\u003e\n\u003cp data-start=\"723\" data-end=\"740\"\u003eOther rainbowfish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"741\" data-end=\"758\"\u003e\n\u003cp data-start=\"743\" data-end=\"758\"\u003ePeaceful tetras\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"759\" data-end=\"770\"\u003e\n\u003cp data-start=\"761\" data-end=\"770\"\u003eCorydoras\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"771\" data-end=\"796\"\u003e\n\u003cp data-start=\"773\" data-end=\"796\"\u003eSmall gobies or loaches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"798\" data-end=\"844\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"798\" data-end=\"808\"\u003eAvoid:\u003c\/strong\u003e fin-nippers or aggressive cichlids.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"That Aquarium Place","offers":[{"title":"Default Title","offer_id":52034847244582,"sku":null,"price":14.99,"currency_code":"USD","in_stock":false}],"url":"https:\/\/thataquariumplace.com\/products\/australian-rainbowfish-melanotaenia-fluviatilis","provider":"That Aquarium Place","version":"1.0","type":"link"}