Preheat oven to 350 degrees.
In a medium mixing bowl, combine cream cheese, mayonnaise, egg and old bay seasoning. Stir until well mixed.
Add in the spinach, crab meat and cheese. Combine well, adding breadcrumbs if the filling mixture needs more binding.
Place salmon on a baking sheet drizzled with olive oil and season with salt and pepper.
Fill the entire cavity of the fish with the cream cheese mixture.
Tie the whole salmon closed with baker's twine.
Cook the salmon at 350 degrees for 50-60 minutes or until the internal temperature reaches 145 degrees F.
Garnish with a sprinkle of fresh parsley, a squeeze of fresh lemon juice, and extra lemon wedges.