Congo tetra (lat. Phenacogrammus interruptus) is a timid, but unspeakably beautiful aquarium fish. Probably, it is the most gorgeous fish of the characin family. A tank, which has tetra fishes in it, should be thickly planted. The majority of these fishes has a very good looking coloring (due to some special pigments they have, that change their color under different kinds of lights).
Red eye tetra (lat. Moenkhausia sanctaefilomenae) once was the most spread and common tetras in a tank. A school of these characins can make any tank look nice and lively, but nowadays the fish has yielded the palm to other fishes. Is a peaceful active fish, quite easy in care. This fish needs to be in the school much more unlike it’s relative redeye tetra. Regardless of how many of them are in a tank: three, eight or twenty species – they always swim in a school.
Silver dollars fish (lat. Metynnis argenteus) belongs to Characidae family. In the 19th century in the USA there was a coin of 1$ nominal, so it was noticed that the fish juveniles due to their rounded and flattened body shape really may resemble the coin and their silvery coloring only made the likeness stronger.
The serpae tetra (lat. Hyphessobrycon eques) is a tropical freshwater species which are sometimes referred to as red tetra. This is an overwhelmingly beautiful fish that looks like a small moving flame in a tank. You won’t be able to take your eyes of tetras school in an aquarium.