Heat olive oil in large skillet over medium heat. Add garlic and fennel.
Saute 2 to 4 minutes or until fennel begins to soften. Add shrimp and
oregano. Raise heat slightly and saute for 3 to 5 additional minutes or until
shrimp is cooked.
Add Marinara Sauce, basil, salt and pepper; continue to toss the pasta
with the sauce while cooking 3 to 5 additional minutes.
Cook spaghetti according to package directions. Drain. Transfer hot spaghetti to a large serving platter. Pour sauce over spaghetti and serve immediately.