Max Size: 10cm

Blue Eyed Congo Tetra (Phenacogrammus aurantiacus)

The Blue Eye Congo Tetra is a shy but stunning fish. These are hardy, peaceful schooling fish that typically remain in large groups in the wild. It is therefore imperative that you keep these fish in groups of at least six to eight individuals. This schooling nature creates spectacular bursts of colour that will be the focus of attention in your aquarium. In addition, these fish make an excellent community fish.

Blue Eye Congo Tetras are timid by nature; therefore, it is not advisable to keep them with much larger fish, speedy fish or fish that may be aggressive towards them. The best tankmates for these fish are other Characins, Rainbowfish, Corydoras and Dwarf Cichlids, but this is not to say that various species are not fitting. However, it would be better to keep fish that have more or less the exact nature of the Blue Eye Congo Tetra. Furthermore, it may not be ideal to keep fish that are much smaller than they are together as they can nip at them.

These fish will show their best colours in a planted aquarium with open space for swimming and added driftwood. They seem to prefer dim lighting, and an African biotope tank with floating vegetation, driftwood branches and anubias would be ideal. The water should be on the acidic side of neutral and soft with a good current.

Blue Eye Congo Tetras have dark brown to black slender bodies that display bright blue spots accompanied by a vivid horizontal stripe that can be yellow, orange or greenish. Below that strip, they reveal another horizontal band that is pale blue with many different reflecting colours. In addition, the edge of the stomach has bright blue spots, and their eyes are a brightish blue.


Blue Eyed Congo Tetra
Quick Facts
Scientific NamePhenacogrammus aurantiacus
Other NamesLamp Eye Congo Tetra, Golden Congo Tetra, Yellow Congo Tetra
OriginsDemocratic Republic of the Congo, Gabon
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH6.0 - 7.5
GH3 - 18
72 - 82℉
22.2 - 27.8℃


In the home aquarium, the Blue Eyed Congo Tetra will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Sexual Dimorphism

It is effortless to differentiate between male and female Blue Eyed Congo Tetras. The adult males are larger and more colourful, and they also have elongated dorsal and caudal fins that may develop filaments. In contrast, females are duller, more petite and lack long fins.

Frequently asked questions

Are Blue Eye Congo Tetras aggressive?

Blue Eye Congo Tetras are not aggressive; in fact, they are relatively shy species. However, they may occasionally nip on the fins of much smaller fish.

How big do Blue Eye Congo Tetras grow?

Blue Eye Congo Tetras can grow to a maximum of 10 cm, with the males typically growing bigger than the females.

What are the Best tankmates for Blue Eye Congo Tetras?

Blue Eye Congo Tetras can live happily among other Tetra species such as Cardinal Tetras, Neon Tetras and Glowlight Tetras. They can also be housed with species such as Mollies, Platies and Guppies as these fish all have a similar temperament and can live in the same water conditions.

Some other potential tankmates can include Dwarf Cichlids, smaller Barbs, Corydoras Catfish, and Rasboras. However, you should avoid larger, more aggressive species such as Tiger Barbs or Bettas.

What should I feed my Blue Eye Congo Tetras?

Blue Eye Congo Tetras are not picky eaters and are easily fed. However, ensure you provide your fish with a balanced diet of good quality dried food alongside Live and frozen food and plant matter. This will guarantee the best colour and condition of your fish.

What's the difference between male and female Blue Eye Congo Tetras?

It is super easy to distinguish male from female Blue Eye Tetras. Males are larger than females, have longer fins and are much more brightly coloured.

Where do Blue Eye Congo Tetras originate?

Blue Eye Congo Tetras come from Africa, usually in the middle and upper River Basins of the Republic of Congo. They inhabit the edges of fast-flowing waters surrounded by dense vegetation where they feed on insects, worms and other zooplankton.

Other Tetras of interest

Adonis Tetra(Lepidarchus adonis)
African Moon Tetra(Bathyaethiops caudomaculatus)
African Red Eyed Tetra(Arnoldichthys spilopterus)
Arowana Tetra(Gnathocharax steindachneri)
Black Darter Tetra(Poecilocharax weitzmani)
Black Line Tetra(Hyphessobrycon scholzei)
View all Tetras
Date Added: 16/06/2021 14:04:26 - Updated: 08/08/2022 16:08:47