{"product_id":"black-harlequin-rasbora","title":"Black Harlequin Rasbora","description":"\u003ch2 style=\"font-family: Georgia, serif; font-size: 1.4em; font-weight: normal; letter-spacing: 0.08em; color: #0a2a3a; border-bottom: 2px solid #3a7ca5; padding-bottom: 8px; margin-bottom: 18px; text-transform: uppercase;\"\u003eBlack Harlequin Rasbora\u003c\/h2\u003e\u003cp style=\"font-family: Georgia, serif; font-size: 1.05em; line-height: 1.8; margin-bottom: 16px; color: #2c2c2c;\"\u003e\u003cstrong\u003eBlack Harlequin Rasbora\u003c\/strong\u003e (\u003cem\u003eTrigonostigma heteromorpha\u003c\/em\u003e) is a selectively bred melanistic variant of the classic Harlequin Rasbora. The entire body takes on a deep charcoal to black coloration — a bold, graphic fish that makes a striking contrast alongside the standard copper or purple harlequin forms.\u003c\/p\u003e\u003cp style=\"font-family: Georgia, serif; font-size: 1.05em; line-height: 1.8; margin-bottom: 16px; background-color: #e0f0f8; border: 1px solid #b0d0e8; padding: 14px 18px; color: #0a2a3a;\"\u003e\u003cstrong\u003eFeeding \u0026amp; Care Tip:\u003c\/strong\u003e \u003cstrong\u003eHikari Micro Pellets\u003c\/strong\u003e make an excellent daily staple. Supplement 2–3× per week with \u003cstrong\u003eHikari Frozen or Freeze-Dried Tubifex Worms\u003c\/strong\u003e or \u003cstrong\u003eHikari Frozen or Freeze-Dried Baby Brine Shrimp\u003c\/strong\u003e. High-quality varied feeding helps maintain the deep black pigmentation. Feed small amounts 2–3 times daily.\u003c\/p\u003e\u003cp style=\"font-family: Georgia, serif; font-size: 1.05em; line-height: 1.8; margin-bottom: 16px; color: #2c2c2c;\"\u003eCare requirements are identical to the standard Harlequin Rasbora. The black body coloration is most dramatic against lighter green plants — the contrast of jet black fish against bright green aquatic plants is very striking.\u003c\/p\u003e\u003cp style=\"font-family: Georgia, serif; font-size: 1.05em; line-height: 1.8; margin-bottom: 16px; color: #2c2c2c;\"\u003eKeep in groups of at least six, preferably ten or more. Particularly effective when kept in a mixed school alongside the standard Harlequin or Purple Harlequin forms — three color expressions of the same species.\u003c\/p\u003e\u003cp style=\"font-family: Georgia, serif; font-size: 1.05em; line-height: 1.8; margin-bottom: 24px; color: #2c2c2c;\"\u003eAn excellent choice for aquarists wanting to add a dark, dramatic element to a schooling community tank.\u003c\/p\u003e\u003ch3 style=\"font-family: Georgia, serif; font-size: 1.05em; font-weight: normal; letter-spacing: 0.1em; text-transform: uppercase; color: #0a2a3a; border-top: 1px solid #b0d0e8; padding-top: 18px; margin-bottom: 14px;\"\u003eCare \u0026amp; Ideal Parameters\u003c\/h3\u003e\u003ctable style=\"width: 100%; border-collapse: collapse; font-family: Arial, Helvetica, sans-serif; font-size: 0.92em;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eDifficulty\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003eEasy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eTemperament\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003ePeaceful — Community\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eTypical Adult Size\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e1.75 inches (4.5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eMin. Group Size\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e6 minimum — groups of 12+ produce more natural schooling behavior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eIdeal Temp\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e72–82°F (22–28°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eIdeal pH\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e6.0–7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eIdeal GH\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e2–8 dGH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eIdeal KH\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003e1–6 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eStaple Food\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003eHikari Micro Pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eTreat \/ Supplement\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003eHikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #e0f0f8; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003eCaptive-bred cultivar of Malaysian\/Thai wild stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #0a2a3a; font-weight: 600; width: 38%; border: 1px solid #b0d0e8; vertical-align: top;\"\u003eNotes\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; background-color: #ffffff; color: #2c2c2c; border: 1px solid #b0d0e8;\"\u003eMelanistic cultivar of standard Harlequin Rasbora — care identical. Bold black coloration most dramatic against bright green plants.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Cuboid Nature Aquarium","offers":[{"title":"Default Title","offer_id":48792712872247,"sku":"Trigonostigma heteromorpha","price":5.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/cuboidstore.com\/products\/black-harlequin-rasbora","provider":"Cuboid Aquatics LLC","version":"1.0","type":"link"}