The Glowlight tetra is a shoaling fish that should be kept with at least four other members of its own species. Keeping an even larger shoal is recommended, since this will make the Glowlight tetras feel much safer in the aquarium. They will also be more active and exhibit a much broader range of natural behaviours. It is common for this species to form smaller groups when there is a predator (or perceived predator) in the aquarium, and then proceed to swim more freely when they feel safe again. Glowlight tetras are mid-dwellers in the aquarium and will usually stay a few centimetres above the bottom. During feeding, they will quickly swim to the top of the water column since they are happy eaters. If you take good care of your Glowlight tetra, it can live for up to 2-4 years in captivity. aquaticcommunity.com Tetra are species of small freshwater fish from Africa, Central America and South America belonging to the biological family Characidae and to its former subfamilies Alestiidae (the "African tetras") and Lebiasinidae. The Characidae are distinguished from other fish by the presence of a small adipose fin between the dorsal fin and caudal fin. Many of these, such as the neon tetra (Paracheirodon innesi), are brightly colored and easy to keep in captivity. Consequently, they are extremely popular for home aquaria From Wikipedia, the free encyclopedia