FISH
Fish that live in natural waters of Hungary (rivers, lakes, channels). These species developed because of the environmental factors and they can breed by themselves.
- species settled by themselves
- species naturalized by humans
These species got to Hungary as ornamental fish but somehow they got out into living water (thermal springs, warm-water streams, lakes) and there they bred and also interbred.
Source: http://tomolyka.freeweb.hu
természetkalauz, magyar könyvklub. Édesvízi halak