Neon Tetra
Paracheirodon innesi
🌍 Overview
The neon tetra is a small, brightly colored schooling fish native to the clearwater and blackwater streams of the western Amazon Basin. Its iridescent blue stripe is produced by light-reflecting cells called iridophores rather than pigment, and this stripe visibly dims while the fish sleeps at night - a natural nocturnal change. Neon tetras are intensely social and rely on large schools for both natural behavior and reduced individual stress.
📋 Quick Facts
Native Range
Amazon Basin (Peru, Colombia, Brazil)
Natural Habitat
Clearwater and blackwater forest streams
Adult Size
1-1.5 inches (2.5-4 cm)
Wild Diet
Small insects, worms, crustaceans, and zooplankton
Wild Lifespan
5-8 years
Conservation Status
Not evaluated (widespread and common)
⚖️ Compare
Neon Tetra
Human
Adult Size
1-1.5 inches (2.5-4 cm)
5-6 feet (150-185 cm); ~135-200 lbs
Wild Lifespan
5-8 years
~73 years (global average)
Wild Diet
Small insects, worms, crustaceans, and zooplankton
Omnivorous - eats just about anything
Native Range
Amazon Basin (Peru, Colombia, Brazil)
Global - originated in Africa roughly 300,000 years ago
Natural Habitat
Clearwater and blackwater forest streams
Everywhere from arctic tundra to tropical megacities
Conservation Status
Not evaluated (widespread and common)
Least Concern (8+ billion and counting)
🧠 Test Yourself
What's the Neon Tetra's native range?
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🤓 Did You Know?
A neon tetra's iridescent blue stripe isn't pigment - it's produced by light-reflecting cells called iridophores. That stripe actually dims or goes nearly dark while the fish sleeps at night, a completely natural nocturnal color change rather than a sign of illness.
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