Serpae Tetra

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Serpae Tetra


The Serpae Tetra is widespread through Rivers in South America.


4 – 5cm or 1.5 – 1.75 inches

Aquarium Size:

90 litres/20 gallons – despite their small size, these are active, shoaling fish best kept in larger groups.

Preferred water conditions:

  • Temp: 22-26°C
  • pH: 5 – 7.8
  • Hardness: Soft <15dGH


Serpae Tetra are omnivorous and will readily accept flake or small pellet foods. They will also appreciate more meaty treats such as daphnia and brine shrimp.


Serpae Tetra are schooling fish and are best kept in larger groups in order to bring out the most natural behaviour. A very peaceful fish the Serpae is rarely a threat to other fish but could be an easy snack to larger fish if kept in the same aquarium.


Females appear rounder than males. Males are slender and show slightly brighter colours, particularly when they are ready to spawn.


Serpae Tetra will readily breed in the correct conditions. Spawning occurs in plants or a spawning mop, the female will scatter eggs and the male will fertilise them. Eggs are best separated from the parents as they are likely to eat them. 


Serpae Tetra are a very popular aquarium fish. Their bright colours and shoaling can transform the drabbest of aquariums into a sea of colour. Despite their small size, Serpaes do require a larger aquarium as they are best kept in schools. 6 Serpae should be considered an absolute minimum but to witness their true behaviour more are needed, numbers of 12+ will help them to feel most secure.

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