
Black Phantom Tetra
Megalamphodus megalopterus
- Care level
- Beginner
- Adult size
- 3.6 cm
- Minimum tank
- 72 litres
- Temperature
- 20–28 °C
Species profile
Hyphessobrycon herbertaxelrodi
Common names: Black Neon Tetra, Black Neon

A peaceful Brazilian tetra with a bold black band below a pale line. It is hardy, sociable, and a good choice for a planted community aquarium.
A slim fish with a broad black band along the flank, topped by a pale, slightly iridescent line. The eye often shows a touch of red above the pupil.
The black band without any red marks it apart from Neon and Cardinal Tetras.
Mature females are deeper-bodied and slightly larger than males.
Provide planted edges with open swimming space. Dark substrate and some floating cover make the black band stand out.
A peaceful, active schooling fish that uses the middle of the tank.
Keep a mixed-sex group of at least 8 to 10.
Not territorial.
Suitable with other peaceful tetras, rasboras, corydoras, and small gouramis. Avoid fish large enough to swallow it. Shrimplets may be eaten.
Adapts to a broad range, but soft to moderately hard water suits it best. Keep ammonia and nitrite at zero.
An undemanding omnivore that takes most small foods.
Vary the diet through the week, and feed in small amounts so nothing reaches the substrate uneaten.
An egg-scattering free spawner with no parental care. Move conditioned adults to a dim tank with mesh, marbles, or spawning mops. Eggs usually appear the following morning, and the adults should then be removed.
You can write a note about what worked for you, or send a photograph. We check everything before it appears here.