In a large bowl, mix together the shrimp, crabmeat, onion, bell pepper, jalapeno pepper, black olives, garlic, cumin, chili powder, oregano, salt, pepper, cilantro, and cheeses.
Spoon the mixture into the tortillas, roll up, and place seam-side down in a 9x13 inch baking dish.
Pour enchilada sauce over the enchiladas, and sprinkle with remaining cheese.
Bake in preheated oven for 25 minutes, or until sauce is bubbly and cheese is melted.
Garnish with sour cream, green onions, and avocados.
Interesting Facts
Seafood enchiladas are a popular dish in Mexican cuisine.
The combination of shrimp and crab make this dish a tasty and healthy option.
This dish can be served as a main course or an appetizer.