The black neon tetra (Hyphessobrycon herbertaxelrodi) is a freshwater fish of the characin family (Characidae) of the order Characiformes.

[4] This species is of typical elongated tetra appearance; it is of plain basic coloration, but with two distinct, adjacent, longitudinal stripes; white above black.

[3] Additionally, the variety named Diamond or Brilliant does not have a white stripe but instead displays more reflective scales around the head.

Black Neon Tetras are egg-scattering free spawners, and they show no parental care for fry.

[3] Present in both forest streams and seasonal floodwaters, the Black Neon Tetra is an adaptable species.

Before attempting to breed the black neon tetra, breeders condition the prospective parents with live food.

[7] Although the black neon tetra can be kept in water harder and more alkaline than its natural habitat, for breeding it is necessary to be closer to what it would feel like in the Amazon.