Black neon tetra (Hyphessobrycon herbertaxelrodi)

Family: Characidae

A peaceful omnivore characidae from the Paraguay basin of Brazil — beginner-friendly.

Care parameters

Water temperature: 23–27 °C
pH: 5.5–7.5
GH hardness: 5–15 dGH
Adult length: 2.2–3.2 cm
Minimum tank: 32 L
Water layer: Mid-water swimmer; keep 8+
Difficulty: Easy
Temperament: Peaceful
Origin: 南美洲巴西巴拉圭河流域

Species overview

Hyphessobrycon herbertaxelrodi is a Characidae. In the aquarium it stays peaceful. Plan on 2.2–3.2 cm of adult fish at 23–27 °C. Related profiles: Hyphessobrycon amandae, Hyphessobrycon eques, Hyphessobrycon erythrostigma.

Native biotope

Habitat: Clear streams, rivers and still waters
Flow: Moderate flow
Dissolved O₂: Average oxygen needs

Aquascape & hardware

Substrate: Smooth gravel and sand with open floor space
Hardscape: Driftwood, water-worn stones and shelters that mimic the native biotope
Plants: Hardy plants on hardscape; keep the floor open

Temperament, diet & tankmates

Schooling: Keep 8+; larger groups settle better
Diet: Omnivore; quality prepared foods with variety
Recommended tankmates: Amur False Gudgeon — Similar size and water needs
Striped Bitterling — Similar size and water needs
Acheilognathus gracilis — Similar size and water needs
Avoid keeping with: Large aggressive cichlids — Bullying and injury risk
Known fin nippers — Constant stress and fin damage

Breeding & notes

Sexual dimorphism: Males are typically slimmer and more intensely colored; females fuller-bodied
Breeding method: Egg-scatterer over fine plants; condition with rich foods and simulate seasonal changes

Frequently asked questions

Is Black neon tetra easy to keep?

Rated easy — peaceful.

What temperature and water chemistry does Black neon tetra need?

Aim for 23–27 °C. Standard heater to hold the mid-range steadily; 23–27 °C recorded range.

How big does Black neon tetra get, and what tank size?

Expect 2.2–3.2 cm as an adult, living mid-water swimmer; keep 8+. A 32 L tank or larger gives it room.

What does Black neon tetra eat?

Omnivore; quality prepared foods with variety. Feed two small meals a day rather than one large one.

Can Black neon tetra live with other fish?

Yes, with care. Peaceful — pair it with Amur False Gudgeon — Similar size and water needs, Striped Bitterling — Similar size and water needs, Acheilognathus gracilis — Similar size and water needs and skip Large aggressive cichlids — Bullying and injury risk, Known fin nippers — Constant stress and fin damage.

Where does Black neon tetra come from?

Its home waters are 南美洲巴西巴拉圭河流域 — clear streams, rivers and still waters, with moderate flow.

How does Black neon tetra breed?

In the aquarium: egg-scatterer over fine plants; condition with rich foods and simulate seasonal changes. Males are typically slimmer and more intensely colored; females fuller-bodied.