Dwarf Toothless Tetra

Elachocharax pulcher is one of the most obscure micro-characins in the aquarium hobby, originating from the extreme blackwater of the Rio Negro drainage. It is notable for its uniquely lipless, toothless mouth — an unusual morphological feature within Characidae — and its small, delicately spotted, nearly transparent body. Even experienced collectors rarely encounter this species.

Care requirements are analogous to those of other extreme blackwater micro-tetras: ultra-soft, very acidic, warm water with heavy tannins, zero flow, and dim lighting. It must be kept in a species or near-species aquarium where competition for the finest micro-foods is minimised.

Feeding with paramecia, infusoria, and the smallest baby brine shrimp nauplii is essential. This is not a fish for the impatient or the novice, but for those who succeed it represents a truly extraordinary achievement in the hobby.

Water: 26–30°C, pH 4.0–6.0, ultra-soft (GH 0–3, KH 0–1); blackwater with heavy tannins. Tank: 30 L minimum; species tank; zero flow, botanicals, extremely dim lighting. Feeding: Paramecia, infusoria, baby brine shrimp nauplii, nano powdered food. Breeding: Essentially undocumented; presumed to scatter eggs among fine substrate. Compatibility: Species-only or with equally tiny peaceful blackwater micro-tetras only.