Add the shrimp and cook until just cooked through, about 3 minutes. Season with 1 teaspoon of salt and pepper to taste. In a small bowl, stir together the tomatoes, orange zest and jalapenos. Place the linguine in a large bowl. Add the shrimp mixture, the tomato mixture and the remaining oil and toss to combine. Season with additional salt and pepper to taste. Divide pasta among 4 plates. Combine the fennel tops and parsley and sprinkle over pasta. Serve immediately.