Winter flounder—a.k.a. lemon sole when it’s big, and blackback flounder when it’s not—takes its name from the fact that it swims inshore to warmer waters during the winter months.

Lent season is here, and to serve its customers, Popeyes brings back its Flounder Fish Sandwich. The Flounder Fish Sandwich made its debut in 2021, and this time, it is available in classic as ...