The Ou River () or Oujiang is the second-largest river in the Zhejiang
province of eastern China
. The river flows before finally reaching the city of Wenzhou
and emptying into the East China Sea
, into which it discharges of water annually. Shen Jiang (), Jiang Yongjia (), and Wenjiang () are all former names for this river.
The Ou River has a rich fish fauna. A 2010 survey recorded 60 different fish species, with goldfish
, bagrid catfish
, and ''Pseudobagrus tenuis
'' being the most prolific in range. Compared to a 1972 survey, 20 new species were recorded, including two alien species
and largemouth bass
); however, 34 species recorded in 1972 were absent in 2010, and overall fish density was lower.
Goby ''Pseudorhinogobius aporus
'' is endemic
to the Ou River system: it is only known from a brook in the upper Ou River system.
Category:Rivers of Zhejiang