Biwa trout

Species of fish

The Biwa trout is an anadromous salmonid fish of the genus Oncorhynchus, endemic to Lake Biwa in Shiga Prefecture, Japan, but also introduced to Lake Ashi and Lake Chūzenji. While called trout, the fish is most closely related to the masu salmon of the western Pacific Ocean, and is most often considered a subspecies of it, Oncorhynchus masou rhodurus.

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