Neon Tetra The third most popular aquarium fish in the USA market, the Neon Tetra is affordable, sturdy, and so friendly the fish will school with other species. Should be kept with six or more. Similar to cardinal tetras, they do not grow quite as large and have a horizontal red bar that extends only halfway along the body. The bright red and blue reflective colors look wonderful as the school around in community and planted tanks. Scientific Name: Paracheirodon innesi Origin: Amazon Basin Lifespan: 4 years Max Size: 1 inches Food: flake, live, frozen Shipping size: 1/2 to 1 inch