Cook the fettuccine pasta according to package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the diced onion and sauté for about 3 minutes until translucent.
Stir in the minced garlic and sliced red bell pepper, cooking for an additional 2-3 minutes until the peppers soften.
Add the shrimp to the skillet and cook for 3-4 minutes, or until they turn pink and opaque.
Pour in the coconut milk and stir in the Jamaican jerk seasoning and lime juice. Let the mixture simmer for 5 minutes, allowing the flavors to meld.
Season with salt and pepper to taste.
Toss the cooked fettuccine into the skillet, mixing well to coat the pasta with the creamy sauce.
Serve immediately, garnished with fresh cilantro.