Petromyzon

The monotypic genus occurs in North America,North Africa, Europe, and occasionally in the Eastern Mediterranean. It is one of the largest lampreys in the world and the most well-known and best studied, especially due to its invasion and tremendous effects in the North American Great Lakes. There is no record of larvae or an established population of Petromyzon in West Asia. Therefore, the solitary individuals found are likely stayers from the western Mediterranean population. On the other hand, larvae are difficult to find, and more research is needed.