Ecosystem Reference
Ecosystem Soca
Type River (basin)
Salinity freshwater
Other Names Isonzo
Europe. Flows through Western Slovenia and Northeastern Italy. FishBase does not have latitudinal and longitudinal range for this ecosystem.
Location Map
Size Ref
River Length 140 km Area Drainage Area 3400
Average Depth Max Depth Ref
100 Meters Depth
Description The So?a (in Slovene) or Isonzo (in Italian, other names Friulian: Lusinç, archaic German: Sontig, Latin: Aesontius or Sontius) is a 140 km long river that flows through Western Slovenia and North-Eastern Italy. An Alpine river in character, its source lies in the Trenta Valley in the Julian Alps in Slovenia, at around 1,100 metres of altitude. The river runs past Slovenia's highest peak, Triglav (2,864 m) before heading south past the towns of Bovec, Kobarid, Tolmin, Kanal ob So?i, Nova Gorica (where it is crossed by the Solkan Bridge) and Gorizia, entering the Adriatic Sea close to the Italian town of Monfalcone. The So?a Valley was the stage of major military operations including twelve battles on the Italian front in World War I between May 1915 and November 1917, in which over 600,000 Austro-Hungarian and Italian soldiers lost their lives. Due to its emerald green water, the river is also known under the name "The Emerald Beauty". It is said to be one of the rare rivers in the world that retain such a colour throughout their length. The So?a inspired the poet Simon Gregor?i? to write his best-known poem So?i (To the So?a), one of the masterpieces of Slovene poetry. The So?a is also well known for its unique trout species Salmo marmoratus (known as the marble trout), which lives in the upper course of the crystal-clear river. This species is endangered due to the introduction of other non-indigenous trout species sometime between World War I and World War II. This region served as a film location for the 2008 Disney film Chronicles of Narnia: Prince Caspian.
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FishBase Literature
Species Families Species Families Reference
14 7
Torres, Armi G. on 04.12.10
Modified by Torres, Armi G. on 05.27.21
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