The name of half-day demon grilled fish comes from the folklore of Dongting Lake in Yueyang, Hunan.

There is a mysterious creature near Dongting Lake in Yueyang, Hunan. It looks like a fish, but it has human wisdom and emotion. This creature only appears during the day and disappears at night, so it is called "half-day demon" by the locals. The name of half-day demon grilled fish originated from the folklore here, and became a kind of food name with special meaning and local characteristics.