Common Name(s)
Featherfin tetra, one-line tetra, crystal tetra
Scientific Name
Hemigrammus unilineatus
Family
Characidae
Origin
Venezuela, Guyana, Suriname, French Guiana, Trinidad and Tobago, Peru, and Brazil.
Temperament
Peaceful
Maximum Size
2 inches
Minimum Tank Size
15/20 gallon with minimum base dimensions of 24 x 12
Tank Setup
Looks best in a planted tank with a dark substrate and background.
Tank Region
Middle-top
Diet
Unfussy eater, will take most foods.
Breeding
Egg-scatterer, showing no parental care.
Compatibility
With other temp-compatible community fish
Ease of Keeping
Fairly easy
Care
pH: Doesn't matter; Temperature: 74-82 Fahrenheit
Hemigrammus_unilineatus.jpg

Door Carl H. Eigenmann, 1912 - https://www.flickr.com/photos/internetarchivebookimages/tags/bookidfreshwaterfishes00eige, Public domain, https://commons.wikimedia.org/w/index.php?curid=46416992

A schooling fish, so should be kept in groups of 6+ of their own species.

Can be sexed by viewing its swim bladder, which is rounded in females and pointed in males.

It is an uncommon species in the hobby.