Clean the mantis shrimp under cold running water. In a frying pan, brown the garlic cut in half with a little olive oil and pepper, then remove it and add the peeled tomatoes. Cook for about 10 minutes over high heat, turning occasionally, salt and add a handful of chopped parsley. Add the mantis shrimps, stir gently and cook with the lid over medium heat for another 5-10 minutes, until the shrimp are done. Meanwhile, cook the pasta in boiling salted water. Remove the shrimps from the pan and set them aside in a covered dish. Drain the pasta “al dente” and add to the sauce pan, if necessary adding a ladle of pasta cooking water. Toss the pasta with the sauce and serve it hot with the shrimps and a sprinkle of chopped parsley.