Spread 2/3 cup Parmesan sauce onto bottom of 13x9-inch pan. Cover with 3 lasagna noodles and layers of half each
of the shrimp, crabmeat and spinach mixture; top with 2/3 cup of the remaining Parmesan sauce. Repeat layers, starting with noodles. Top with remaining noodles, Parmesan sauce and mozzarella; cover.