The red-bellied piranha or red piranha (lat. Pygocentrus nattereri) — is a predatory fish kind. It belongs to the piranha Serrasalmidae subfamily, which is one of the most well-known kinds of piranha. Due to Hollywood films, it is famous as a bloodthirsty predator, but are piranha really that dangerous? Further in the article, you’ll find information about their habitat, how they hunt, how to keep the fish in a tank, and if it is possible to keep piranha together with other tank dwellers.
Pacu fish (lat. Colossoma macropomum) is a freshwater ray-finned fishes kind from the subfamily Serrasalminae, Characidae family, or (according to another classification) from Serrasalmidae family, the only kind of Colossoma genus. It is one of the piranha families known for its blood lust. But unlike its “cousins” and despite a strong and massive body, this fish prefers plant food and belongs to the herbivorous class.
X-ray fish or X-ray tetra (lat. Pristella maxillaris) is a fish kind of Characidae family. This is the only species of Pristella kind. The fish is a perfect choice for beginner aquarists, it is very undemanding and it can live in water with various parameters.
The diamond tetra (lat. Moenkhausia pittieri) belongs to Characidae family. The fish got its name due to its opalesque scales, that are especially beautiful at dim light. However, to see the full richness of the coloring you’ll have to wait, since the juveniles are quite plainly colored.