Black Line Tail Tetra
Black Line Tail Tetra
Black Line Tail Tetra (Moenkhausia costae) is a Moenkhausia tetra with a distinctive bold black line at the base of the caudal fin and into the tail — a clean, graphic black caudal marking on a silver body. Named for ichthyologist Otávio Costa.
Feeding & Care Tip: Sera Vipan Tropical Flakes and Hikari Micro Pellets make excellent daily staples. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Bloodworms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp, or Hikari Vibra Bites. Feed small amounts 2–3 times daily.
Native to northeastern Brazil — the São Francisco and coastal Atlantic drainage systems. Moderately adaptable to water conditions.
Keep in groups of at least 8. The black caudal marking is most graphic at rest. Peaceful community tetra.
A cleanly marked and reliable tetra.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — schooling community |
| Typical Adult Size | 2.0 inches (5 cm) |
| Min. Group Size | 8 minimum |
| Ideal Temp | 72–82°F (22–28°C) |
| Ideal pH | 6.0–7.5 |
| Ideal GH | 3–15 dGH |
| Ideal KH | 1–8 dKH |
| Staple Food | Sera Vipan Tropical Flakes; Hikari Micro Pellets |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Bloodworms; Hikari Frozen or Freeze-Dried Baby Brine Shrimp; Hikari Vibra Bites |
| Origin | Northeastern Brazil — São Francisco and coastal Atlantic drainages |
| Notes | Named for ichthyologist Otávio Costa. Bold black caudal base line marking. |
