In a mixing bowl, combine crab meat, chopped shrimp, cream cheese, green onions, lemon juice, garlic powder, salt, and black pepper. Mix until well combined.

Set the filling aside.

Preheat the oven to 375°F (190°C).

Using a sharp knife, make a pocket in each salmon fillet by slicing horizontally, being careful not to cut all the way through.

Stuff each salmon fillet with the crab and shrimp filling, pressing gently to secure.

Place the stuffed salmon fillets in a baking dish and drizzle with olive oil.

Bake in the preheated oven for 20-25 minutes, or until the salmon is cooked through and flakes easily with a fork.

Remove from the oven and let rest for a few minutes before serving.

Garnish with lemon slices and serve warm.