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Biwa Trout (Oncorhynchus masou rhodurus) - Wiki
Subject: Biwa Trout (Oncorhynchus masou rhodurus) - Wiki
Biwa Trout(Lake Biwa-JP) - Biwa Salmon (Oncorhynchus masou rhodurus).jpg
Resolution: 1222x917 File Size: 236103 Bytes Date: 2005:11:01 00:04:31 Camera: PDC2070 (WWL ) F number: f/1.7 Exposure: 10/8000 sec Focal Length: 82/11 Upload Date: 2007:12:17 15:38:03

Biwa Trout (Oncorhynchus masou rhodurus) - Wiki

Biwa trout
From Wikipedia, the free encyclopedia

Order: Salmoniformes
Family: Salmonidae
Species: Oncorhynchus masou (Seema or Cherry Salmon)

[Photo] Species: Oncorhynchus masou rhodurus. Biwa trout or Masou trout (or Biwa salmon) which returned to river which flowed into the northern Lake Biwa in Shiga Prefecture, Japan for spawning. A breeding color has appeared. Top- 20.2in(514mm) male, Bottom- 16.9in(429mm) female. This trout is enzootic to Lake Biwa, Japan. Date: Nov. 01, 2005(JST). Caught & Photo by Vineyard (

The Biwa trout or Biwa salmon, Oncorhynchus masou rhodurus, is an anadromous fish in the salmon family. It is one of several fish called trout but it is, according to taxonomists, a subspecies of the Cherry salmon. It is enzootic to Lake Biwa in Shiga Prefecture, Japan and is found only in the waters of northern Lake Biwa.

The Biwa trout feeds on plankton, aquatic insects, freshwater prawn, lake prawn, worm, Ayu and other small fishes and, sometimes, small mammals. Biwa trout represents a unique food fish for the Shiga prefecture. The fish has a reputation as being very difficult to catch by angling.


Adult Biwa trout usually range from 40 to 50 cm in length and 2.5 to 4.0 kg in weight although large specimens can be up to 70 cm long and 6.0 kg in weight.

Biwa trout as food
Biwa trout and its caviar are considered a delicacy. Usual ways to prepare the trout is as sashimi, by grilling with salt, in meuniere, or by smoking, deep-frying or simmering, etc.
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Freshwater prawn
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