Tetras are small, colorful freshwater fish belonging to the family Characidae. They are popular in home aquariums due to their vibrant colors and peaceful nature. Common species include the Neon Tetra, Cardinal Tetra, and Black Skirt Tetra. Tetras thrive in schools, typically requiring groups of six or more to feel secure and exhibit natural behaviors. These fish are native to various regions in South America, often found in slow-moving rivers and streams. Tetras prefer warm water temperatures and a well-planted environment, which mimics their natural habitat. They are omnivorous, feeding on a diet of flakes, pellets, and live or frozen foods.