noun
kokanee salmon
A landlocked form of sockeye salmon (Oncorhynchus nerka), often found in lakes. The name ヒメマス literally means 'princess trout'.
See also: 紅鮭
北海道の湖ではヒメマスが釣れる。
You can catch kokanee salmon in lakes in Hokkaido.
ヒメマスは紅鮭の陸封型です。
The kokanee salmon is a landlocked form of sockeye salmon.
紅鮭 is the anadromous sockeye salmon, while ヒメマス is its landlocked form.
Compound of 姫 (hime, 'princess') + 鱒 (masu, 'trout'), referring to its smaller size compared to other salmonids.