Spread a couple pats of butter (butter) on the bottom of a casserole dish. Then add 1/2 pound scallops on top of the butter. Layer 1/2 pound shrimp on top of the scallops, followed by a layer of haddock (1 pound). Spread a can of cream of shrimp soup over the seafood. Sprinkle with pepper.
Saute a small onion in butter. Add crushed Ritz crackers to the butter. Add a sprinkle of garlic salt to the butter and crackers. Spread the cracker mixture over the casserole. Sprinkle the top with paprika. Bake at 350 degrees for 35 minutes.