Rummy nose tetra (lat. Hemigrammus rhodostomus) is a fish with bright red spot on its head, its fluke has black and white stripes and the body is silvery. At that tetra is quite small fish – about 4.5 cm long, with a peaceful temper and it can be a good tank mate for any peaceful fish.
The red-bellied piranha (Pygocentrus nattereri) — is a predatory freshwater 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 aquarium 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.