Arby's $4 (€3.01) Fish Combo or two Fish Sandwiches for $4 (€3.01).

Culver's has reintroduced its Northwoods Walleye and is promoting its hand-battered North Atlantic Cod Filet and its North Atlantic Cod Filet Dinner, with two sides and a dinner roll.

Wendy's has brought back its Premium Cod Filet for a limited time, using 100 percent North Pacific cod battered in light Panko breading, topped with tartar sauce and lettuce.

Jack in the Box has two limited time offerings: a Fish Sandwich Combo for $2.99 (€2.25) and Fish & Chips for $4.59 (€3.46). The sandwich is made with two lightly battered fillets of Alaskan pollock topped with lettuce and tartar sauce and served on a warm sesame seed bun.

Popeyes is promoting its Butterfly Shrimp Tackle Box, with eight butterfly shrimp marinated in the chain's signature Louisiana spices and served over a bed of Cajun fries and with a buttermilk biscuit for $4.99 (€3.76).

Kentucky Fried Chicken has a Fish Snacker, featuring a breaded Alaskan pollock fish fillet topped with tartar sauce and served on a warm sesame seed bun.

Taco Cabana is reintroducing its line of Shrimp Tampico items, hand-marinated daily in a mix of chipotle and ancho spices, and grilled with garlic, lime and cilantro.

Long John Silver's recently introduced a new Thick-Cut Cod Basket for $5.99 (€4.51), advertised as the "thickest, most premium fillet ever."

Captain D's has a Southern-style whitefish, two pieces of hand-breaded flounder or a 12-piece butterfly shrimp order, served with two regular sides and Hush Puppies.

Blimpie has kicked off a social media and advertising campaign to push its tuna subs and tuna melts.

McDonald's has its Filet-O-Fish as always. About 23 percent of all Filet-O-Fish sandwiches are purchased during Lent, according to QSRweb.com.

Whataburger's Whatacatch is highlighting a crispy fish fillet topped with traditional tartar sauce and shredded lettuce served on a bun. Customers can also enjoy the sandwich as a taco when they order a Whatacatch on a flour tortilla.

Investor: Seafood’s black Friday is about convenience, health