The Emperor Tetra (Nematobrycon palmeri) is a peaceful, schooling freshwater fish native to South America, notable for its striking colours and elongated fins, particularly in males. This elegant tetra, popular in the aquarium trade in South Africa, features a prominent horizontal black stripe and shimmering purple-blue body hues, with males boasting vivid yellow fins. They are ideal for community tanks, require groups of six or more, and prefer a well-planted aquarium.