also: かわうお
noun
river fish; freshwater fish
Refers to fish that live in rivers, as opposed to saltwater fish. Often used in contexts like fishing, cooking, or ecology.
この地域では川魚料理が名物です。
River fish dishes are a local specialty in this area.
祖父はよく川で川魚を釣っていた。
My grandfather often fished for river fish in the river.
Compound of 川 (kawa, 'river') and 魚 (sakana/uo, 'fish'). The reading かわざかな is the standard modern form; かわうお is older and now rare.