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National Natural Monument
Fish

Iwame (landlocked masu salmon)

Oncorhynchus masou

The Iwame is a stream fish regarded as a variant of the Yamame (masu salmon), with a distinctive appearance in which the usual side markings and black spots are almost absent. It lives in a very small number of mountain streams in Taketa, Oita, including the Sobo mountain area and the Ono River system. A habitat at Kohara in Taketa is a national Natural Monument, and the Iwame of the Sobo mountains is a Natural Monument of Oita Prefecture.

Scientific name
Oncorhynchus masou
Group
Fish
Prefectures
Oita
日本語
イワメ
简体中文
岩目(樱鳟型鲑鱼)

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Natural Monuments related to the Iwame (landlocked masu salmon)

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Markers show designated habitats and breeding sites.

Frequently asked questions

The Iwame (landlocked masu salmon) (Oncorhynchus masou) is protected as a Natural Monument of Japan (2 designations). The Iwame is a stream fish…

The Iwame (landlocked masu salmon) is designated as a species without a fixed area and lives in places such as Oita.

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