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Danaqua Live Fish & More

Bucktooth Tetra (Exodon paradoxus)

Bucktooth Tetra (Exodon paradoxus)

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The Exodon tetra, also known as the Bucktooth Tetra (Exodon paradoxus), is a small, torpedo-shaped freshwater fish that grows to about 4 inches (10 cm) long. It has iridescent silver scales, distinctive black spots, and pronounced teeth that it uses to tear scales and fins off other fish in a predatory behavior known as lepidophagy. These fish are fast, active swimmers that are best kept in large schools in a planted tank with hiding spots, though they can become aggressive and may be a threat to smaller fish. 
Physical Description

  • Size:Typically grows to about 4 inches (10 cm). 
  • Shape:Sleek, torpedo-shaped body. 
  • Coloration:Iridescent silver scales, with black spots and a golden or reddish hue along the flanks. 
  • Teeth:Has pronounced, pointed teeth that are visible from the outside, giving it the name "Bucktooth Tetra". 
Behavior & Diet

  • Predatory:The Exodon tetra is a ferocious predator, particularly skilled at feeding on the scales and fins of other fish (lepidophagy). 
  • Aggression:They are moderately aggressive, especially when in small groups, but can become more so when defending territory. 
  • Activity:Highly active, fast swimmers that need plenty of open swimming space. 
  • Social Behavior:They are shoaling fish that do better in large groups (a shoal of 8 or more is recommended) to prevent stress and aggression within the group. 
Habitat

  • Origin:Found in the Amazon and Orinoco river basins, as well as in Guyana. 
  • Environment:Inhabits areas with a strong presence of aquatic plants, decaying organic matter, and roots. 
Tank Requirements (for aquarists)

  • Tank Size:A minimum of 30 gallons is recommended. 
  • Water Parameters:Keep water between 72-80°F (22-27°C) with a pH of 6.0-7.5. 
  • Decor:Provide plenty of hiding spots and territories using driftwood, rocks, and dense plantings. Dim lighting or floating plants are also beneficial. 
  • Tankmates:Due to their predatory nature, they are best kept in large planted tanks or with other fish that are not susceptible to their scale-feeding behavior, such as catfish. 

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