Cook the Pasta: In a large pot of salted boiling water, cook the pasta shells according to the package instructions until al dente. Drain and set aside, allowing them to cool slightly.

Prepare the Filling: In a skillet, heat olive oil over medium heat. Add the minced garlic and sauté for 1-2 minutes until fragrant. Add the chopped shrimp and cook for another 2-3 minutes until pink.

Mix the Filling: In a large bowl, combine the cooked shrimp, crab meat, ricotta cheese, half of the mozzarella cheese, and half of the Parmesan cheese. Season with salt and pepper, mixing gently until well combined.

Stuff the Shells: Preheat your oven to 375°F (190°C). Using a spoon, fill each cooked pasta shell with the seafood mixture. Place the stuffed shells in a greased baking dish.

Add Sauce: Pour the marinara sauce over the stuffed shells, ensuring they’re well covered.

Top with Cheese: Sprinkle the remaining mozzarella and Parmesan cheese on top.

Bake: Cover the baking dish with aluminum foil and bake in the preheated oven for 15 minutes. Remove the foil and bake for an additional 5-10 minutes, or until cheese is melted and bubbly.

Garnish and Serve: Remove from the oven and let cool for a few minutes. Garnish with fresh parsley before serving.