Everything about rope fish (lat. Erpetoichthys calabaricus) is uncommon – its behavior in a tank, appearance and even its name. It has several ones: ropefish (or rope fish), reedfish, snakefish. But all these names denote one and the same species. It is interesting to watch fish in a tank, easy to keep it but you should bare in mind that its tankmates must be average or large sized. Rope fish takes smaller fish species as a food, since it is a predator by its nature.
Black ghost knifefish (lat. Apteronotus albifrons) is one of the most unusual freshwater fishes that you may encounter in amateur aquariums. The fish has nocturnal habits. During the day time it is rather timid and quite often stays in a shelter on a tank bottom.
Silver arowana (lat. Osteoglossum bicirrhosum) is a tropical freshwater fish of the Osteoglossidae family. Osteoglossidae genus appeared during the Jurassic period and hasn’t changed much during the last 150 million years. It’s a popular tank fish, which is often kept in zoos, public and amateur tanks around the world. In the East countries, it is a symbol of wealth and prosperity. Some fish species can rich dozen thousand dollars.
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.