In this section of the articles library you will find information about the many different Tetra fish species. All the Tetras belong to the family Characidae in the order Characiformes and are small freshwater fishes. Many tropical Tetra fish species are popular among aquarists, especially the species that are brightly colored and easy to care for in captivity.

Cardinal tetra

Cardinal tetra picture. – Copyright www.jjphoto.dk

The most famous of the Tetra species is of course the immensely popular Neon tetra (Paracheirodon innesi). This fish is found in both blackwater and clearwater streams in Brazil, Colombia and Peru. It is a peaceful fish that is commonly kept in community aquariums. It is not hard to care for and is suitable for novice aquarists. The Neon tetra grows no larger than 5 centimeters (2 inches). You should always keep at least 10 Neon tetra fishes together, since this is a schooling species that will feel very stressed if kept alone. Your Neon tetra will appreciate a well planted aquarium, but leave a space open for swimming. Floating plants that will dim the light a bit is recommended. A dark substrate will also help creating a less bright environment in the aquarium since it will not reflect the light. The colors of the Neon tetra will also look more vibrant against a dark substrate. Keep the water temperature between 22 and 25 degrees Celsius. The Neon tetra can live in acidic water as well as in a slightly alkaline environment, so anything from pH 5.5 to pH 7.5 will be okay. Getting a Neon tetra to eat in captivity is definitely not hard and you should strive to avoid over feeding. Choose a high-quality flake food.

An example of a less well-known tropical Tetra fish species is the Congo tetra, Micralestes interruptus. This Tetra is not as sturdy as the Neon tetra and frequent water changes are very important since this species is sensitive to poor water conditions. The aquarium where you house your Congo tetra must also be equipped with sufficient circulation. The Congo tetra is peaceful but can be a little skittish and nervous. You can make your Congo tetra less shy and decrease the stress by decorating the aquarium in a way that creates plenty of hiding spots. The Congo tetra should be kept with at least five other Congo tetras, preferably even more. Aggressive and bullying fish can make the Congo tetra very stressed. The Congo tetra will stay stronger in slightly acidic water, but can tolerate anything from pH 6 to pH 7.5. Wild Congo tetra is found in the warm waters of the Zaire river basin on the African continent, and your Congo tetra will therefore appreciate a water temperature in the 23-26° C (73º -79º F) range. Soft water is best, but a healthy Congo tetra will usually adapt to harder conditions as well.

A third example of an interesting tropical Tetra fish species is the Serpae tetra (Hyphessobrycon eques). This fish has a very beautiful red coloration and is therefore also known as Blood characin, Jewel tetra, Red serpa and an abundance of other names that all alludes to the decorative red color. The red shades vary from reddish brown to a vivid bright red. The main body is red, and so is the all the fins except for the dorsal fin which is black with a white fringe. Behind the gill cover, the body is decorated with a dark marking that is shaped like a comma.

Tropical Tetra Fish Articles

Keeping and breeding Astyanax bimaculatus – Breeding Astyanax bimaculatus
Black Phantom Tetra – Information about keeping and breeding Black Phantom Tetras in aquariums.
Black Skirt Tetra – Information about keeping and breeding Black Skirt Tetras in aquariums.
Bloodfin Tetra – Information about keeping and breeding Bloodfin Tetras in aquariums.
Breeding the Black Tetra – Breeding notes for Gymnocorymbus ternetzi
Cardinal Tetra Fish – An introduction to Cardinal teras – Paracheirodon axelrodi.
Cardinal Tetra – Information about all aspect of keeping and breeding Cardinal Tetras.
Congo tetra – An introduction to Congo tetra – Micralestes interruptus.
Glowlight Tetra – Information about keeping and breeding Glowlight Tetras in aquariums.
Lemon Tetra – Information about keeping and breeding Lemon Tetras in aquariums.
Swordtail Characins – Corynopoma riisei. And how to breed them.
Neon Tetra Fish – An introduction to Neon tetras.
Neon Tetra – An indepth article about Neon Tetras, their breeding and the dreaded Neon Tetra Disease.
Serpae tetra – An introduction to the Serpae tetra.
Spawning Hemigrammus pulcher – Pretty / Garnet tetra – The “Pretty” or “Garnet” Tetra breeds readily in soft acidic water.
Tetra care – An article about how to keep and care for tetras in aquariums.
Tetra Species – List of our Tetra/Characin species profiles.

Tetra Fish Profiles

Benny Tetra – Creagrutus beni
Black Neon Tetra – Hyphessobrycon herbertaxelrodi
Black Pacu – Colossoma macropomum
Black Skirt Tetra – Gymnocorymbus ternetzi
Bleeding Heart Tetra – Hyphessobrycon erythrostigma
Hemigrammus bleheri
Blind Cave Fish – Astyanax mexicanus
Bloodfin Tetra – Aphyocharax anisitsi
Buck toothed Tetra – Exodon paradoxus
Buenos Aires Tetra – Hemmigrammus Caudovittatus
Cochus Blue Tetra – Boehlkea fredcochui
Congo Tetra – Phenacogrammus interruptus
Congo Tetra – Phenacogrammus interruptus
Flame Tetra – Hyphessobrycon Flammeus
Glowlight Tetra – Hemigrammus erythrozonus
Jelly Bean Tetra – Ladigesia roloffi
Lesser Bleeding Heart Tetra – Hyphessobrycon socolofi
Marbled Hatchet – Carnegiella strigata strigata
Marbled Hatchet – Carnegiella strigata strigata
Marbled Headstander -Abramites hypselonotus
Ornate Tetra – Hyphessobrycon bentosi
Cardinal Tetra – Paracheirodon axelrodi
Neon Tetra – Paracheirodon innesi
Penguin Tetra – Thayeria boehlkei
Pepper tetra – Axelrodia stigmatias
Pike Characin – Boulengerella maculata
Pretty Tetra – Hemigrammus pulcher
Red Belly Pacu Piaractus brachypomus
Red Eyed Tetra – Arnoldichthys spilopterus
Red Hook Silver Dollar – Myleus rubripinnis
Rummynose tetra – Hemigrammus rhodostomus
Sabre Toothed Tetra – Hydrolycus scomberoides
Serpea Tetra – Hyphessobrycon Serpae
Silver Dollar – Metynnis hypsauchen
Silver Dollar – Metynnis argenteus
Silver Tip Tetra – Hasemania nana
Socolofs Tetra – Gymnocorymbus socolofi
Spotted Silver Dollar – Metynnis lippincottianus
Striped Silver Dollar – Metynnis fasciatus
Swordtail Characin – Corynopoma riisei
Tail light Tetra – Bryconops melanurus
Tenuise Tetra – Mimagoniates lateralis
Three Spotted Tetra – Odontostilbe kriegi