Oncorhynchus masou (Brevoort, 1856)
Masu salmon
大口马苏大麻哈鱼(降海型),  马苏大麻哈鱼(河川型),  大口馬蘇大麻哈魚(降海型),  馬蘇大麻哈魚(河川型),  马苏大麻哈鱼
Oncorhynchus masou
photo by Kim, I.-S.

Family:  Salmonidae (Salmonids), subfamily: Salmoninae
Max. size:  79 cm TL (male/unsexed); max.weight: 10,000.0 g
Environment:  benthopelagic; depth range 0 - 200 m, anadromous
Distribution:  Northwest Pacific: Japan and adjacent waters.
Diagnosis:   
Biology:  The fluviatile form generally inhabits headwaters and often maintains a territory; it feeds mainly on insects but also on small crustaceans and fishes. The sea-run form goes downstream forming schools, and after a short stay in the brackish zone enters the sea where it feeds on small fishes and pelagic crustaceans. Oviparous (Ref. 205). Eggs are buried in unguarded nests (Ref. 205). Marketed fresh and frozen; eaten broiled and baked (Ref. 9988).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (120744)
Threat to humans:  harmless
Country info:  Introduced from its native range to other regions in the country (intensive culture and extensive stocking in ponds and rivers)(Ref. 55380). Spawning in Tumen River occurs in August (Ref. 51717).

Entered by: Luna, Susan M. - 17.10.90
Modified by: Torres, Armi G. - 09.08.17
Checked by: Froese, Rainer - 08.03.94

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