Toast pine nuts in a small frying pan and reserve.
Heat oil in Dutch oven over medium heat until shimmering.
Add onions, celery, 1/4 teaspoon salt, and 1/4 teaspoon pepper and cook until softened, about 5 minutes.
Stir in thyme, pepper flakes, and garlic and cook until fragrant, about 30 seconds.
Stir in wine, cook until reduced by half. Add reserved tomato juice and clam juice. Bring to simmer, and cook until reduced by half, about 10 minutes.
Stir in tomatoes, raisins, and capers, bring to simmer, and cook until flavors meld, about 15 minutes.
Add shrimp, bay scallops, clams and fish fillets. Cook until done, about 5 minutes.
Serve, sprinkling individual bowls with pine nuts and shave some orange zest on top.