Halibut

Large edible flatfishes

Halibut is the common name for three species of flatfish in the family of right-eye flounders. In some regions, and less commonly, other species of large flatfish are also referred to as halibut. The word is derived from haly (holy) and butte (flat fish), for its popularity on Catholic holy days.

From Wikipedia, under CC BY-SA. More on occurri.