Purple Harlequin Rasbora
Purple Harlequin Rasbora (Trigonostigma heteromorpha) is a selectively bred color variant of the classic Harlequin displaying a striking blue-violet to deep purple iridescence rather than the standard copper-orange. The bold black triangular wedge is retained.
Feeding & Care Tip: Hikari Micro Pellets make an excellent daily staple. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Tubifex Worms or Hikari Frozen or Freeze-Dried Baby Brine Shrimp. Feed small amounts 2–3 times daily.
Care requirements are identical to the standard Harlequin Rasbora. This fish thrives in soft, slightly acidic water with a planted background and dark substrate, which maximizes the purple-blue iridescence.
Keep in groups of at least six, preferably ten or more. The blue-violet sheen intensifies when males are actively displaying. Particularly stunning when kept in a large school against red aquatic plants.
A wonderful choice for aquarists who love the Harlequin's body shape but want a more unusual color palette. The shifting, jewel-like shimmer is genuinely eye-catching.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — Community |
| Typical Adult Size | 1.75 inches (4.5 cm) |
| Min. Group Size | 6 minimum — groups of 12+ produce noticeably brighter color |
| Ideal Temp | 72–82°F (22–28°C) |
| Ideal pH | 6.0–7.0 |
| Ideal GH | 2–8 dGH |
| Ideal KH | 1–6 dKH |
| Staple Food | Hikari Micro Pellets |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp |
| Origin | Captive-bred cultivar of Malaysian/Thai wild stock |
| Notes | Selectively bred color form of Harlequin Rasbora — care identical. Blue-violet iridescence most vivid in planted tanks with dark substrate. |
