Neon Tetra
What is neon tetra?
Key facts
The neon tetra is a small, peaceful freshwater fish native to the Amazon basin, known for its bright blue and red stripes. It is scientifically named Paracheirodon innesi and belongs to the family Characidae.
Context
The neon tetra is a popular aquarium fish due to its vibrant colors and peaceful nature. It is native to blackwater and clearwater streams in the Amazon basin of South America [1]. These fish are known for their striking blue and red stripes, which make them a favorite among hobbyists. They are relatively small, reaching about 1.5 inches in length, and can live for 5 to 10 years with proper care [1]. Neon tetras are schooling fish and thrive when kept in groups of at least six, as this mimics their natural social behavior [1]. They prefer soft, slightly acidic water and stable conditions, which can be challenging for beginners to maintain [1]. In the wild, they feed on insects, worms, and small crustaceans, but in captivity they accept a variety of prepared foods [1].
Documented claims
Questions and answers
Why are neon tetras so hard to keep alive?
Neon tetras are sensitive to water quality and require stable, soft, acidic water. They are also prone to stress and disease if kept in small groups or unsuitable conditions [1].
How many neon tetras should be together?
Neon tetras are schooling fish and should be kept in groups of at least six to feel secure and exhibit natural behavior [1].
What is the lifespan of a neon tetra?
Neon tetras can live for 5 to 10 years with proper care [1].
Can I put neon tetras in a 2 gallon tank?
A 2-gallon tank is too small for neon tetras. They need ample swimming space and stable water conditions, so a larger tank is recommended [1].
Sources
- neon tetra (Paracheirodon innesi) - Species Profile — nas.er.usgs.gov (retrieved August 3, 2026)
- Neon Tetra: A Complete Species Profile — flipaquatics.com (retrieved August 3, 2026)