Preheat oven to 400° F.
Spray cookie sheet with cooking spray.
Pat catfish dry; then coat catfish with seafood seasoning.
Bake fish for 12 minutes. Cool for 5 minutes; then cut into 1-inch chunks.
In a medium-size mixing bowl, fold together all remaining ingredients. Add catfish chunks, and toss. Cover, and refrigerate for 10 minutes.
Serve on a toasted po’boy roll with potato chips.