Scrub potatoes with brush. Rub lightly with canola oil. Bake at 400 F until done, about 40 to 60 minutes.
While potatoes are baking, cook shrimp in lightly salted water. Peel and cut into pieces about ¼ inch. When potatoes are cool to touch, cut in half lengthwise. Carefully scoop out pulp, leaving a firm shell about ¼ inch thick.
Combine pulp, margarine, cream, sour cream, cheese, onion, nutmeg, salt and pepper. Mix until smooth. Stir in shrimp. Gently mix in crabmeat, being careful not to break crab pieces apart.
Stuff shells with mixture. Sprinkle lightly with paprika. Bake at 400 F until heated through, about 15 minutes.
Contributed by Joyce Taylor