Cardinal Tetra


These very popular community tropical fish are a great addition for beginners. They are bright, lively fish that are happy in a shoal.

This tiny characin comes from the soft, acidic waters of the Rio Negro drainage in Brazil and reaches just a couple of centimetres in length. It’s a gregarious species that appreciates being in a large group and makes for a stunning aquarium showpiece.

Please be aware that the image is for illustration purposes only. We are unable to guarantee the size, colour, sex or age of the fishes you are purchasing. If you have any questions regarding livestock please contact us. To minimise stress we are unable to hand pick specific fish. Lifespan is an estimate based on optimum conditions.


Approx. size: 1-2cm
Maximum size: 5cm
Origin: South American
Ideal number kept together: 5+

Water conditions
pH: 3.5–7.5
Hardness: 18–215 ppm
Temperature: 23–29 °C

Ease of Care
Easy. Relatively hardy fish however they thrive in lower pH and blackwater conditions. Slow filter flow is best.

Flake is recommended mainly however can have small live & frozen food such as Daphnia & Artemia. Dried bloodworm as a treat.

Community. Peaceful fish that live best in groups. They look far better as very large shoals in much larger aquariums. Invest in a shoal of 50 plus if you have a big enough tank. Cardinals are ideal community fish and do not bother other fishes. However, they are quite small so ensure any other fish kept with them are not going to try and eat them. Angelfish can often prey on Cardinals.

Popular tankmates: Rummynose, Otocinclus, pencilfish, hatchetfish, Corydoras.

Intermediate. They will need their own tank, dimly lit and perfect water conditions. Males fertilise as the female scatters up to 500 eggs. Once laid the eggs can sink and stick to plants.

Life Span
They can live to anything from 2-5 years in perfect conditions.

Available on back-order