Fresh-water trout can be found in Manchuria, South Korea, Japan, and Tachia Creek, serving as living evidence of Taiwan's former attachment to the Asian continent.
目前這種陸封性鱒魚，只分佈在我國東北、韓、日與大甲溪流域，「台灣鱒也成了台灣原與亞洲大陸相連的活標本」，水產試驗所所長鄧火土說。