Preheat the oven to 350°F.
In a medium-sized bowl combine the imitation crab and lobster meat with the shrimp and mayonnaise. Stir well. Then fold in the sliced green onions.
Transfer the mixture into a 1-quart baking dish sprayed with non-stick spray, top with the mozzarella, and bake for 25 to 30 minutes.
