The Emperor Tetra (Nematobrycon palmeri) is a small freshwater fish native to the Pacific slopes of Panama and Colombia. It is a popular aquarium fish due to its beautiful blue, red and silver coloration. The body of the Emperor Tetra is long and slender, with a pointed snout and a forked tail. It usually grows to just over an inch in length, and can live for up to 5 years in captivity. The Emperor Tetra is a peaceful fish that does best in a community tank with other small, peaceful species. It is an omnivore and will feed on a variety of flake and frozen foods.