Satsukimasu salmon

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Satsukimasu salmon
Oncorhynchus masou ishikawae by OpenCage.jpg
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Oncorhynchus
Species: O. masou
Subspecies: O. m. ishikawae
Trinomial name
Oncorhynchus masou ishikawae
Jordan & McGregor, 1925

Oncorhynchus ishikawai Jordan & McGregor, 1925

The satsukimasu salmon,[1] red-spotted masu salmon,[2] amago,[2] or Amago-Trout (Oncorhynchus masou ishikawae) is a salmonid fish in the Pacific salmon genus Oncorhynchus. It is endemic to Japan.

It was initially described as a distinct species and was cited as such by IUCN,[1] but it is more lately commonly considered a subspecies of the masu salmon or seema (Oncorhynchus masou).[2][3] FishBase however considers it to be the same taxon as O. masou masou.[4]

The Iwame trout in turn was recently confirmed to refer in part to an unspotted recessive morph of the amago.[2]


  1. ^ a b Kottelat, M. 1996. Oncorhynchus ishikawai. 2010 IUCN Red List of Threatened Species. Downloaded on 18 June 2010.
  2. ^ a b c d Kano, Y., Shimizu, Y., Kondou, K. 2006. Sympatric, Simultaneous, and Random Mating Between Markless Trout (Iwame; Oncorhynchus iwame) and Red-spotted Masu Salmon (Amago; Oncorhynchus masou ishikawae). Zoological Science 23:71-77. doi:10.2108/zsj.23.71
  3. ^ Species in the genus Oncorhynchus W. Eschmeyer: Catalog of Fishes. California Academy of Sciences. Downloaded 18 June 2010
  4. ^ Froese, Rainer, and Daniel Pauly, eds. (2010). Oncorhynchus masou masou in FishBase. Nov 2010 version.