Paracheirodon innesi, commonly known as the neon tetra, is a small freshwater fish native to the Amazon Basin in South America. It typically grows to about 1.5 inches (4 cm) in length and is known for its vibrant blue and red coloration, which makes it a popular choice for home aquariums. Neon tetras are social fish that thrive in schools of six or more. They prefer densely planted tanks with subdued lighting, mimicking their natural habitat. These fish are omnivorous, feeding on small insects, crustaceans, and plant matter in the wild.