The Tetra Fish, is a big bunch of different versions of the same Tetra species. For instance, these are some of the types of Tetras you can get from a store: Neon Tetras, Rosy Tetras, Lemon Tetras, Penguin Tetras and other as well. One of the most commonly bought versions, is the Neon Tetra. This is a very small fish, that grows only up to 1.5 inches long. Even so, it is among the most beautiful freshwater fish you could get. And on top of that, it lives up to 8 years old. They like to school together, and most of their time is spent swimming around in the tank, especially in the water column. Because of their peaceful behavior, they are the perfect addition to a community aquarium.