Many McDonald's franchises are doing Filet-O-Fish Fridays though prices and participation seem to vary with location. Here in southern California, it's $1.29 for a Filet-O-Fish on Fridays during Lent (I read it's 2 for $3 in New York). The Filet-O-Fish (McFish!) shows up with a battered patty of Alaskan pollock and hoki, a half slice of cheese, and tartar sauce on a steamed bun.
Wendy's is again trotting out their Premium Fish Fillet in time for Lent which features hand-cut fillets of Pacific-caught cod breaded with Panko, tartar sauce, and lettuce. The Premium Fish Fillet goes for ~$3.49 and is a limited time item.
Jack in the Box is offering their Fish Sandwich, which contains two crispy fish fillets, lettuce, and (you guessed it) tartar sauce, at the promo price of $1.49
Among other chains: Del Taco is offering Shrimp Tacos for $1.89, Shrimp and Fries, and Fish and Fries; Popeyes has its Butterfly Shrimp Tackle Box for $4.99 which includes battered fries and a biscuit as well as deep-fried battered shrimp.
USA Today has this neat little story about the Lent-related origins of the Filet-O-Fish, and how it was originally supposed to be halibut but then was switched to cod (though is now a blend of pollack and hoki).
Please let me know if there are any other listings I should add. Thanks!
