289 Silurus glanis Linnaeus, 1758 Siluridae Sheatfishes Siluriformes Teleostei Wels catfish Europe and Asia. North, Baltic, Black, Caspian and Aral Sea basins, as far north as southern Sweden and Finland; Aegean Sea basin in Maritza and from Struma to Sperchios drainages; Turkey. Absent from the rest of Mediterranean basin. Now widely introduced and translocated throught Europe and Lake Balkhash basin in Kazakhstan. Several countries report adverse ecological impact after introduction. Silurus glanis P 91018.0046 Silurus glanis P 91018.0047 Silurus glanis P 91029.0002 Silurus glanis P 91088.0001 Silurus glanis P 99072.0311 40 N 31 E Silurus glanis IGFA 46 N 61 E Silurus glanis IGFA 41 N 0 E Silurus glanis AMNH 18758 Silurus glanis AMNH 175 Silurus glanis Silurus glanis Silurus glanis Silurus glanis FISH 2078483 53 N 14 E 925 Silurus glanis AMNH 36490 1970 Silurus glanis 1982 Silurus glanis 1.3 m 1995 Silurus glanis 0.9 m 1996 Silurus glanis 0.5 m 1997 Silurus glanis 0.7 m 1997 Silurus glanis 0.7 m 1998 Silurus glanis -0.9 m 1998 Silurus glanis 11 m 1999 Silurus glanis 0.6 m 1999 Silurus glanis -0.9 m 1999 Silurus glanis 0.5 m 2000 Silurus glanis 0.4 m 2000 Silurus glanis -0.9 m 2001 Silurus glanis 0.8 m 2001 Silurus glanis 0.8 m 2001 Silurus glanis 0.6 m 2002 Silurus glanis 0.45 m 2002 Silurus glanis 0.7 m 2002 Silurus glanis 0.5 m 2003 Silurus glanis 0.8 m 2003 Silurus glanis 0.7 m 2003 Silurus glanis 0.6 m 2003 Silurus glanis 1 m