The name was conferred on the river owing to a nearby milk-colored lake.

[2] The Uda is a prime habitat for the pink, chum, red, and coho salmons.

Other fish species found in the Uda include the Siberian taimen, two forms of lenok, and Amur grayling.

Taimens grow to huge sizes here; specimens weighing 95 kilograms (209 lb) have been caught here.

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