“…Spain, Germany, England, France, the Netherlands, Belgium and Austria) in the second half of the 19th century (Welcomme, 1988;Elvira & Almodóvar, 2001;Copp et al, 2005). Currently, according to many sources listed by Rutkayová, Biskup, Harant, Šlechta, and Koščo (2013), A. nebulosus has been reported in 37 European countries. Information about its occurrence is still limited, although several authors report that in some places it can create stable populations and continue to be a significant part of the fish fauna (Holčík, 1991;Keith & Allardi, 1998;Rechulicz, Płaska, Tarkowska-Kukuryk, Mieczan, & Pęczuła, 2015).…”