South American Pufferfish (Colmeses Asellus)

South American Pufferfish (Colmeses Asellus)

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SA Puffers are a unique active species to have in an aquarium. With proper care and consideration given to their specialized needs, these pufferfish can thrive in a well-maintained aquarium environment, delighting aquarists with their antics and personality.

Origin: Colomesus asellus is native to freshwater habitats in South America, specifically found in the Amazon and Orinoco River basins, as well as various river systems in Brazil, 

Max Size:

  • Adults typically reach a size of around 4 to 6 inches in length.


  • Generally solitary and territorial
  • Nocturnal feeders, becoming more active during the night.

Tank Requirements:

  • Minimum tank size of 30 gallons with additional space needed for each additional pufferfish.
  • Provide plenty of hiding spots and dense vegetation to mimic their natural habitat and offer territories for each fish.
  • Utilize smooth substrate to prevent injury to their delicate mouths.

Water Parameters:

  • Temperature: 75°F to 82°F (24°C to 28°C).
  • pH: 7.0 to 8.0.
  • Hardness: Moderately hard to hard water preferred.


  • Carnivorous diet consisting primarily of small crustaceans, snails, insects, and other invertebrates.
  • Offer a variety of live, frozen, and freeze-dried foods, including bloodworms, brine shrimp, snails, and krill.
  • Hard-shelled foods are essential to help wear down their continuously growing teeth.


  • Can be aggressive towards tank mates, especially smaller fish that may be seen as prey.
  • Best kept in a species-specific tank.

Special Notes:

  • Due to their territorial nature and potential aggression, careful consideration should be given to tank mates and tank setup to ensure the well-being of all inhabitants.
  • Provide regular enrichment activities and a varied diet to promote mental stimulation and overall health.