Silurus glanis, commonly known as the Wels catfish, is a large freshwater fish native to the river basins of Eastern and Central Europe. It is recognized for its elongated body, smooth skin without scales, and two long barbels. This nocturnal predator inhabits deep rivers and lakes, feeding on fish, amphibians, and occasionally birds.

Silurus glanis, commonly known as the Wels catfish, is native to Central, Eastern, and Southern Europe, as well as parts of Western Asia. Its geographical distribution includes countries such as Germany, Poland, Russia, and regions around the Caspian Sea, Black Sea, and Aral Sea.

The Wels catfish typically inhabits large, slow-moving rivers, lakes, and reservoirs. It prefers freshwater environments with muddy or sandy bottoms and abundant vegetation. The species thrives in temperate climates, with water temperatures ranging from 3°C to 30°C, although it prefers warmer waters.

Silurus glanis is a nocturnal predator, occupying the ecological niche of a top predator in its freshwater ecosystem. It feeds on a variety of prey, including fish, amphibians, and occasionally small mammals and birds. The Wels catfish plays a crucial role in maintaining the balance of its aquatic ecosystem by controlling the population of its prey species.