Using a large pot, over medium heat, melt the butter.
Add the onion and celery to pot; sauté onion until softened.
Season with salt, pepper and Old Bay seasoning.
Add garlic and tomato paste; cooking until aromatic.
Sprinkle in the flour to create a roux; ensuring the flour is fully absorbed.
Gradually add the fish stock (or vegetable broth) and white wine with along a bay leaf.
Allow the bisque to simmer and thicken.
Remove from the heat; remove the bay leaf; use an electric blender to blend until smooth.
Return the pot to the heat; mix in the heavy cream and half the crab meat; warming gently.
Serve with the extra crab meat and parsley.