What are the five living organisms you might put in your tropical fish tank?

In a tropical fish tank, you might include colorful species like neon tetras, guppies, and angelfish for vibrant displays. Adding a bottom-dwelling fish like a Corydoras catfish helps maintain the tank's cleanliness. Additionally, incorporating shrimp such as cherry shrimp can aid in algae control, while live plants provide oxygen and natural habitats for the fish.