Tetra fish primarily inhabit the rivers and streams of South America and Africa.
These colorful freshwater fish are primarily found in the Amazon Basin and other river systems of South America. While most tetra species live in these vibrant aquatic environments, there's a unique exception: the blind cave tetra, which resides in a cave system in Mexico. Therefore, their habitats vary from the fast-flowing rivers to calmer streams and even underground caves, depending on the species.
