The Glowlight Tetra, or Hemigrammus erythrozonus, is a small, peaceful, schooling freshwater fish native to the slow-moving rivers of South America, particularly Guyana. It is characterized by its translucent body and a single, bright, glowing red-orange stripe running horizontally from its head to its tail. They are popular in the South African aquarium trade due to their vibrant color, hardy nature, and low-maintenance needs.