Paracheirodon innesi, commonly known as the Neon Tetra, is a small freshwater fish native to the Amazon basin. It features iridescent blue and red stripes, thrives in warm, slow-moving waters, and is known for its schooling behavior. These fish are peaceful, making them popular in aquariums.

Paracheirodon innesi, commonly known as the neon tetra, is native to the freshwater regions of South America. Its geographical distribution includes the western Amazon basin, specifically in the countries of Brazil, Colombia, and Peru. The species is primarily found in the Rio Solimões, Rio Putumayo, and Rio Nanay rivers.

The neon tetra inhabits clearwater and blackwater streams and tributaries. These environments are characterized by a tropical climate with warm temperatures ranging from 20 to 28 degrees Celsius (68 to 82 degrees Fahrenheit). The water is typically soft and acidic, with a pH range of 5.0 to 7.0.

Neon tetras are small schooling fish that occupy the middle and lower regions of the water column. They thrive in densely vegetated areas where they can find cover from predators and forage for food. Their diet consists of small invertebrates, crustaceans, and plant matter. The species has evolved to exhibit bright coloration, which is thought to aid in schooling and predator avoidance in the dimly lit waters of their native habitat.