The Samarga watershed is so far the only place in the Primorsky territory with very high fish biodiversity and high natural fish productivity. The diversity of habitats provides for a wide variety of fish species. A wide variety of fish, nearly 20 species –such as
pink salmon,
masu salmon,
chum salmon,
cherry salmon,
Dolly Varden,
white-spotted char, and
grayling salmon – are abundant in the river and its tributaries. The river basin is also home to the largest population of a rare salmonid species –
Sakhalin taimen. The Anadromous salmon (pink, masu, chum, and the less abundant
coho) comprise a substantial part of the river biomass. The
pink salmon stock is the largest, comprising 10% of the total population of
pink salmon of the Russian mainland Sea of Japan coast.
Masu salmon stocks rank second after pinks, and char are fairly abundant. The production topography of the Samarga is also very interesting. The lowest part of the river – from Unty Creek to the river mouth – is a zone of
pink salmon,
chum,
rainbow smelt, and grayling salmon. The middle part of the river – from Zova Creek to Unty Creek – is an area of
pink salmon, adult
masu,
taimen,
lenok, and grayling salmon. The upper reaches of the river – upstream from Zova Creek – are home to juvenile masu,
taimen, and grayling salmon. ==Ecosystem==