Tucano Tetra
Tucano Tetra(Tucanoichthys tucano) is one of the most extraordinary nano fish in the freshwater hobby — barely reaching one inch, rarely exported, and named not for the tropical bird but for the Tucano indigenous people who inhabit the Rio Uaupés region of the Brazilian Amazon where this species lives. Described only in 1997 by Géry and Römer, it remains uncommon and is sometimes found as accidental by-catch in Cardinal Tetra shipments. Juveniles display a brilliant blue-green iridescent stripe.
Feeding & Care Tip:Hikari Micro Pellets(crushed or soaked briefly) andSera Vipan Babymake excellent daily staples. Supplement 2–3× per week withHikari Frozen or Freeze-Dried Baby Brine ShrimpandHikari Frozen Daphnia. Feed small amounts 2–3 times daily in a calm environment.
Native to shallow flooded forest streams of the upper Rio Uaupés — a blackwater tributary of the Rio Negro — where the water is deeply tannin-stained, extremely soft and acidic, and shaded by a dense forest canopy. A mature blackwater setup with Indian almond leaves, dark fine substrate, and very soft acidic water is essential.
Unlike true schooling tetras, Tucano Tetras are more social than strictly schooling — males guard small spawning territories. Keep one male per clearly defined territory with several females. Do not keep with boisterous or larger fish.
A specialist fish for the blackwater nano aquarist. Groups of 10 or more produce the most natural behavior. The Tucano Tetra’s rarity and remarkable origins in the ancestral territory of an Amazonian people make it one of the most meaningful fish in the hobby.
Care & Ideal Parameters
| Difficulty | Moderate — Advanced |
| Temperament | Peaceful — blackwater specialist |
| Typical Adult Size | 1.0 inch (2.5 cm) |
| Min. Group Size | 10 minimum — 1 male per territory |
| Ideal Temp | 75–82°F (24–28°C) |
| Ideal pH | 5.0–6.8 |
| Ideal GH | 0–5 dGH |
| Ideal KH | 0–3 dKH |
| Staple Food | Hikari Micro Pellets (crushed/soaked); Sera Vipan Baby |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Baby Brine Shrimp; Hikari Frozen Daphnia |
| Origin | Upper Rio Uaupés system, Amazonas state, Brazil |
| Notes | Described 1997 by Géry and Römer. Named for Tucano indigenous people, not the bird. One of smallest tetras. Often arrives as Cardinal Tetra bycatch. Juveniles have vivid blue-green stripe. More territorial than schooling. |
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