Freshwater
Black tetra
Gymnocorymbus ternetzi
Acestrorhamphidae, Pristellinae
Facts
Characteristics
- Length
- Up to 7.5 cm
- Body shape
- Deep-bodied
Care
- Group
- At least 6 together
- Smallest aquarium
- 62 liters
- Diet
- Missing
Know what is missing? Suggest it in the app.
Behavior
Water values
Smallest tank
Range
NativeIntroduced
Lives wild in Argentina, Bolivia, and Brazil.
Introduced to Colombia and Thailand.
Tank mates
More about the species
Description
Occurs in the middle and upper water layers. Feeds on worms, small crustaceans and insects. Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm.
Other names
Other scientific names
- Gymnocothymbus ternetzii
- Tetragonopterus ternetzi
In other languages
- Svart tetra
- Sorgmanteltetra
- Sort tetra
- Mustatetra
- Black widow, Black widow tetra, Blackamoor, Butterfly tetra, Petticoat tetra
Articles
All articles
How many fish can I keep?4 min read
Why "one cm of fish per liter" falls short, and what adult size, schools, territory and swimming zones mean for how many fish a tank can hold.
Fish that get along4 min read
Temperament, fin nippers, fish that eat other fish, and fish that need the same water. And what the Harmony mark in the app means.
How to set up a South American aquarium4 min read
Soft, acidic water, subdued light, sand, roots and fallen leaves: how to set up a biotope aquarium from the Amazon and the rivers around it.
How to add new fish4 min read
From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.