Aquarium tetras are small, vibrant freshwater fish known for their striking colors, peaceful nature, and ease of care, making them a popular choice for home aquariums. Native to rivers in South America and Africa, they thrive in groups and prefer well-planted tanks with stable water conditions. Common species, such as neon tetras and cardinal tetras, display beautiful hues of blue, red, and green, which shimmer under aquarium lights. Tetras are active, social swimmers and typically coexist well with other small, non-aggressive fish, making them ideal for community tanks.