Oncorhynchus masou macrostomus

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Oncorhynchus masou macrostomus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Oncorhynchus
Species: Oncorhynchus masou
Subspecies: O. m. macrostomus
Trinomial name
Oncorhynchus masou macrostomus
(Günther, 1877)

Oncorhynchus masou macrostomus, also referred to as the amago or the red-spotted masu salmon, Amago-Trout, is an anadromous salmonid fish endemic to Japan.

O. m. macrostomus is a subspecies of the more widespread Northwest Pacific cherry salmon or masu salmon (Oncorhynchus masou). It is distributed in western Japan, on the Pacific side of the Honshu and Shikoku islands, and on the Inland Sea of Japan side of Kyushu.[1] The subspecies is a subject of aquaculture.[1] It can grow up to 50 cm length.


  1. ^ a b Froese, Rainer, and Daniel Pauly, eds. (2010). Oncorhynchus masou macrostomus in FishBase. April 2010 version.