Pollock has made its way onto several restaurant menus in the U.S. as the Lenten season kicks off this year, but many other species, including shrimp, flounder, cod, and more, are also being featured.

As Catholics seek meatless Friday options this Lent, fast-food chains are rolling out fish sandwiches. Wendy's, Bojangles, Del Taco and others are offering seafood deals.