Zander (Sander lucioperca, syn. Stizostedion lucioperca) is a species of fish from freshwater and brackish habitats in western Eurasia. It is closely related to perch. Zander are often called pike-perch as they resemble the pike with their elongated body and head, and the perch with their spiny dorsal fin. Zander are not, as is commonly believed, a pike and perch hybrid. In Europe, a second species (Sander volgensis) is limited to rivers in southern Russia and the basin of the Danube. These two species are suspected to hybridize occasionally where they are sympatric, as they produce fertile hybrids in captivity; no natural hybrids are known yet however, and while they are apparently hard to detect, it is suspected that the species are separated by strong prezygotic isolation. It strongly resembles, both in looks and in taste, the closely related American walleye (Sander vitreus).