The largest contemporary fish living exclusively in freshwater is ...
Beluga (Huso huso)
Arapaima (Arapaima gigas)
Pangaz (Pangasianodon gigas)
Chinese Paddlefish (Psephurus gladius)
The arapaima, pirarucu, or paiche are any large species of bonytongue in the genus Arapaima native to the Amazon and Essequibo basins of South America. Genus Arapaima is the type genus of the family Arapaimidae. They are among the world's largest freshwater fish, reaching as much as 3 m (9.8 ft).
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+1 Very interesting! Kampfgraff
+1 Very interesting! M
+1 Very interesting! Fabienne