Congo tetra
A colourful African freshwater fish kept in home aquaria for its bright scales and feathery tail.
The Congo tetra is a species of characin found in the central Congo River Basin. It is widely kept in aquariums due to its vivid iridescent colours and distinct tail fin shape.
- Males reach 7.6 cm with feathery violet tails
- Native to the central Congo River Basin
- Iridescent colours shift from blue to red to gold
- Spawns in soft acidic water with plant cover
- Listed as Least Concern by the IUCN
What it is
This fish belongs to the African tetra family and displays a full-bodied shape with large scales. Mature individuals show iridescent colours running from blue on top through red and yellow-gold to blue near the belly. The most distinct feature is the tail fin, which becomes a grayish-violet feathery appendage with white edges. Males grow larger than females and possess more vibrant colouring and extended fins.
Where it lives
The species is native to the central Congo River Basin in Africa. It inhabits freshwater environments within this region.
How it lives
Information on wild behaviour, diet, schooling patterns, migration routes, and natural predators is not included in the provided text.
Breeding and life cycle
These fish scatter eggs without parental care, often in groups or pairs. Spawning occurs in soft slightly acidic to neutral water between 24 and 27 degrees Celsius. Males display intensified colours and extended fins during courtship. Females release adhesive eggs among vegetation or substrate. Eggs hatch in six to seven days. Fry require microscopic food initially before moving to brine shrimp. Adults may eat their own eggs so separation is common.
Fish and people
The Congo tetra is a popular choice for home aquariums. Breeding in captivity can be challenging and requires careful monitoring of water parameters. A separate breeding tank is often used to protect eggs. Fine-leaved plants or spawning mops provide surfaces for egg attachment. Juveniles develop characteristic colours and elongated fins as they mature over nine to twelve months.
Status and threats
The International Union for Conservation of Nature lists the Congo tetra as Least Concern. This indicates the species is currently widespread and abundant enough not to face immediate risk of extinction based on current assessments.
Questions people ask about Congo tetra
How big do Congo tetras get?
Males grow up to 7.6 cm while females reach about 7.0 cm. Males are larger and display more intense colouration with extended dorsal and tail fins compared to females.
What makes the Congo tetra look unique?
Its tail fin develops into a grayish-violet feathery appendage with white edges. Mature fish also show iridescent bands of blue, red, and yellow-gold across their bodies.
How do you breed them in an aquarium?
Provide soft slightly acidic water at 24-27°C with fine plants. Separate adults after spawning to prevent egg eating. Feed fry microscopic food then brine shrimp as they grow.
Is the Congo tetra endangered?
No. The IUCN Red List classifies it as Least Concern, meaning it is currently stable and not facing significant threats that would endanger its survival.
Good reading and sources
The facts on this page come from the Wikipedia article "Congo tetra", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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