Freshwater
Redeye tetra
Bario sanctaefilomenae
Acestrorhamphidae, Thayeriinae
Facts
Characteristics
- Length
- Up to 7 cm
- Body shape
- Deep-bodied
Care
- Group
- At least 6 together
- Smallest aquarium
- 55 liters
- Diet
- Missing
Know what is missing? Sign up and suggest it in the app.
Behavior
- Temperament
- Peaceful
- Swims
- Missing
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Water values
Smallest tank
55 liters38 × 38 × 38 cm · For 6 fish
Worked out from its length, as we don’t yet know what size tank it should have. Do you? Sign up and tell us in the app.
Try other measures in the appNative
Lives wild in Argentina, Brazil, Paraguay, and Uruguay.
Videos
The Fish of Rio das Mortes – Brazil’s Hidden Aquatic Treasure
CHRIS LUKHAUPAug 23, 2026
More about the species
About the species
Feeds on worms, insects, crustaceans and plant matter. Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 80 cm.
Source: FishBase
Other names
Other scientific names
- Moenkhausia australe
- Moenkhausia sanctae-filomenae
- Moenkhausia sanctaefilomenae
- Tetragonopterus sanctae filomenae
- Tetragonopterus sanctaefilomenae
In other languages
- Rødøyetetra
- Rödögonmoenkhausia, Nättetra
- Smokingtetra
- Punasilmätetra
- Red eye tetra, Red-eye tetra, Yellow-banded moenkhausia, Yellowhead characin
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.