X-Ray/Pristella Tetra

The X-Ray Tetra, also known as the Pristella Tetra or water goldfinch, is a small, peaceful freshwater fish famous for its see-through body. Native to South America, it is a hardy, beginner-friendly schooling fish that grows up to 1.5–2 inches long and lives for about 4–5 years.

Key Overview Facts

• Scientific Name: Pristella maxillaris
• Appearance: Translucent or transparent silver body where the spine and internal organs are visible, accented by a reddish tail and distinctive yellow, black, and white bands on the dorsal fin.
• Size: 1.5 to 2 inches (3.8 to 5 cm)
• Lifespan: 4 to 5 years
• Origin: Amazon and Orinoco basins in South America, including coastal rivers in the Guianas and Brazil.

Tank and Care Requirements

• Minimum Tank Size:
  10 gallons, though a 20-gallon or larger tank is better for a proper school.

• Social Behavior:
  Highly gregarious schooling fish; must be kept in groups of at least 6 to 8 individuals to prevent stress.

• Water Parameters:

  • Temperature range: 74°F–80°F (23°C–27°C)
  • pH level: 6.0–8.0
  • General adaptability to soft or moderately hard water

• Diet:
  Omnivorous and unfussy; accepts high-quality flakes, micro-pellets, and frozen or live foods like brine shrimp and daphnia.

This beautiful, low-maintenance species is perfect for beginner aquarists and adds a unique, shimmering charm to any freshwater aquarium.