1 cup Crab Meat
2 cups frozen Shrimp
1 pint Hellmann's mayonnaise
2 cups diced celery
1 medium onion
1 cup mushrooms
1 tsp. salt
1 tsp. pepper
1 can sliced water chestnuts

Put in buttered casserole and top with crumbs. Bake at 350 degrees F for 30 minutes.