Astyanax -

the type of fish in the family tetras (Charac idae), covering more than 100 freshwater species described scient ifically. This is the next Hyphesobrycon, most of the type specie s of the order kąsaczokształtnych. These fish inhabit fresh wat ers of the Americas. In addition to the forms of the river, living in surface waters, among them colonizing underwater caves blind fish - which are the object of many scientific studies. Some species are used as aquarium fish. Nature has been described by S.