Nurse Tetra Breeding Guide
Breeding the Nurse Tetra (Brycinus nurse): a large potamodromous African alestid; aquarium spawning is undocumented, with only sexing and genus-pattern notes.
Overview
The Nurse Tetra (Brycinus nurse) is a large schooling African alestid found across West Africa, the Chad basin and the Nile up to Lake Albert, where it lives in rivers, lakes and irrigation canals. FishBase records a maximum length of about 25 cm and lists it as potamodromous, meaning it undertakes freshwater migrations to spawn. There are no documented accounts of aquarium spawning, so the notes below are limited to verified biology and the general Brycinus egg-scattering pattern.
Sexing
FishBase records that the species shows sexual dimorphism affecting the shape of the anal fin, with maturity reached at around 9 cm. Detailed external sexing cues for the aquarium are otherwise sparse.
Conditioning
No species-specific conditioning protocol is documented. As a large, active alestid, it would require a very large tank, a sizeable group and rich live and frozen feeding to bring adults into condition, following the general Brycinus approach.
Breeding Setup
- Aquarium spawning is undocumented; any attempt would need a very large, dimly lit tank to suit a fish reaching about 25 cm.
- Water within the species' range: temperature about 23-27 C, pH 6.0-7.8 (FishBase).
- By the Brycinus pattern, fine-leaved or floating plants and high dissolved oxygen would be expected requirements.
- Its potamodromous, migratory spawning behaviour in the wild may make controlled spawning difficult.
Spawning Behavior & Trigger
In the wild the species is potamodromous and migrates within freshwater to spawn (FishBase). As an alestid, it is an egg-scatterer; by analogy with related Brycinus the adults would scatter eggs into plants and should be separated from them, but no confirmed aquarium spawning account exists.
Egg & Fry Care
No species-specific egg or fry data are documented. By the general Brycinus pattern, free-swimming fry would be started on infusoria or a fine first food, progressing to brine shrimp nauplii as they grow.
Common Challenges
The principal obstacles are the absence of documented captive breeding, the large adult size demanding a very large tank, and the species' migratory (potamodromous) spawning strategy, which is hard to reproduce in an aquarium.