Black Neon Tetra Care Guide – Aquarium Setup, Diet & Breeding

The Black Neon Tetra is a slender, streamlined schooling fish with a dark charcoal body and a striking pair of horizontal stripes. A shimmering white or silvery stripe sits above a broader black band, creating the high-contrast appearance that gives the species its common name. The eyes often show a subtle reddish sheen when viewed under suitable lighting.

Peaceful and active, these tetras spend much of their time in the middle and upper areas of the aquarium. They are most confident when kept in a proper group, where they display coordinated movement without becoming aggressive toward one another or other peaceful fish.

In the wild, Black Neon Tetras live among submerged vegetation, branches and leaf litter in the warm waterways of tropical South America. Their darker natural surroundings help emphasise their reflective lateral markings, which can flash dramatically as the shoal changes direction.

Hyphessobrycon herbertaxelrodi was described from Brazil and has become a long-established favourite in community aquariums. It is often confused with the Neon Tetra because of its body shape and bright stripe, but the Black Neon Tetra is a distinct species with a deeper dark band and generally a slightly more robust appearance.

Black Neon Tetras are native to the upper Paraná and Paraguay river basins in Brazil, South America. They inhabit slow-moving tributaries, flooded forest margins and clear or tea-coloured waters influenced by leaf litter.

A group should be kept in an aquarium of at least 60 litres, ideally measuring around 60 cm long by 30 cm wide or larger so the fish have room to swim. Use a dark or neutral fine-grained substrate with areas of dense planting, especially along the sides and rear, while leaving open swimming space through the centre. Driftwood, roots, leaf litter and subdued lighting help recreate their shaded South American habitat, and gentle to moderate water movement is suitable. A secure lid is advisable because these active tetras can jump.

Up to around 4 cm (1.6 inches) in length. Females are usually slightly larger and deeper-bodied than males.

Black Neon Tetras are omnivores that feed on small aquatic invertebrates, insect larvae, crustaceans and plant material in nature. Offer a varied diet of quality small flakes or micro-pellets alongside frozen or live foods such as brine shrimp, daphnia, mosquito larvae and finely chopped bloodworms. Several small meals are preferable to one large feeding, and all food should be appropriately sized for their small mouths.

Black Neon Tetras are peaceful community fish and can be kept with other similarly sized, non-aggressive species. Suitable companions include Harlequin Rasboras, smaller peaceful rasboras, Glowlight Tetras, Lemon Tetras, Corydoras, Otocinclus and peaceful dwarf cichlids such as German Blue Rams, provided the wider water requirements are compatible. Avoid large predatory fish, fin-nippers and boisterous species that may intimidate or eat them, including larger cichlids and many sizeable barbs.

Black Neon Tetras are egg scatterers that breed most readily in a separate, dimly lit aquarium with very soft, slightly acidic water. Condition a group with plenty of small live or frozen foods, then provide fine-leaved plants or a spawning mop for the eggs. The adults should be removed after spawning because they may eat the eggs. Hatching usually occurs within around 24 to 36 hours, with the fry becoming free-swimming a few days later and requiring infusoria or another suitably tiny first food.

Females are generally fuller through the abdomen and may appear slightly larger, particularly when carrying eggs. Males tend to be slimmer, with a more streamlined profile, although the difference can be subtle outside breeding condition.