The sandwich consists of a crispy, beer-battered Alaskan pollock filet, lettuce, tartar sauce, and tomato on a sesame seed bun. It features the flavor of Redhook Brewery Extra Special Bitter ale.
The Redhook Beer-Battered Fish Sandwich can be found at participating Carl's Jr. restaurants for $3.29. You can also grab two of them for $5 or get one as part of a combo meal along with fries and a drink for $5.89 (prices may vary).
The sandwich is also back at Hardee's. The suggested pricing for Hardee's is $2.99 for the sandwich, two for $5, and a combo for $4.99 (may vary).
You can find my review of the fish sandwich here.
Update 2/26/17 - There was a miscommunication from Carl's Jr. and the filet is now made with wild-caught pollock rather than cod. I've also added information regarding Hardee's pricing for the sandwich.
Photo via Carl's Jr.