African oneline tetra
Nannaethiops unitaeniatus
Also known as One-lined African tetra, Oneline tetra
Care at a glance
- Temperature
- 72–79°F (22–26°C)
- pH
- 6.0–7.5
- Adult size
- 2.6 in (6.5 cm)
- Minimum tank
- 16 gal (60 L)
- Temperament
- Peaceful
- Social behavior
- Schooling
- Swim level
- Middle
- Difficulty
- Easy
- Breeding
- Medium
- Rarity
- Rare
- Origin
- Widespread across Central and West Africa, including the Congo and Niger basins and Lake Chad drainage.
- Family
- Distichodontidae
Overview
This peaceful, easygoing fish does well in a shoal of at least 6 in a planted community tank. It is undemanding about water chemistry but is easily bullied, so keep it with other calm, small fish. Good numbers and gentle tankmates keep it out and active.
In the wild
Lives in streams, small rivers, ponds, and lake margins across a broad swath of Africa. It shoals in the middle and lower water among plants and over soft bottoms. The water ranges from soft to moderately hard.
Good to know
Nannaethiops unitaeniatus is a small African characin of around 6.5 cm in the family Distichodontidae, marked by a single dark stripe from snout to tail. Females grow a little larger than males. Spawning males take on a golden red flush.
Did you know
When a male comes into spawning condition, the plain dark stripe intensifies and his body flushes with warm gold and red.
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
Appears in
Freshwater fish · Beginner fish · Schooling fish · Community fish
Keeping African oneline tetra?
Track water tests, reminders and stocking fit.
Related species

Ansorge's neolebias
Neolebias ansorgii1.4 in (3.5 cm)11 gal (40 L)75–82°F (24–28°C)
Silver distichodus
Distichodus affinis7.9 in (20 cm)53 gal (200 L)73–81°F (23–27°C)
Longnose distichodus
Distichodus lusosso15 in (38 cm)119 gal (450 L)72–81°F (22–27°C)
Six-banded distichodus
Distichodus sexfasciatus15.7 in (40 cm)143 gal (540 L)72–79°F (22–26°C)
Dwarf rainbowfish
Melanotaenia maccullochi2.8 in (7 cm)20 gal (75 L)72–82°F (22–28°C)
Glass catfish
Kryptopterus vitreolus2.8 in (7 cm)30 gal (115 L)70–79°F (21–26°C)
