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, particularly in the Amazon River basin. Tetras prefer warm, soft, and slightly acidic water, making them ideal for community tanks with other non-aggressive species. Their diet mainly consists of flakes, pellets, and live or frozen foods.