Cut the shrimp and salmon into bite-sized pieces and place them in a bowl with the crabmeat.In a Dutch oven or large pot, melt the butter. Once the butter is melted and starting to slightly bubble, add the carrots, onions, celery, potatoes, and corn.
Sauté the ingredients over medium-low heat for 15 minutes, or until the potatoes are barely cooked, stirring occasionally. Add the flour and reduce the heat to low. Cook, stirring often
Add the Seafood Stock and bring to a boil. Once it starts to boil add the seafood, reduce the heat and simmer, uncovered, for 7 to 10 minutes. You want to simmer until the fish is just cooked. Stir in the heavy cream and parsley. Season to taste with salt and pepper.
Seafood Stock:Heat the oil in a stockpot over medium heat. Add the shrimp shells, onions, carrots, and celery and sauté for 15 minutes, or until the onions start to brown. Add the garlic and cook 2 more minutes. Add 3 quarts of water, the wine, tomato paste, salt, pepper, and thyme. Bring to a boil, then reduce the heat and simmer for 1 hour. Strain the stock through a sieve, pressing the solids to extract all the flavorful broth. You should have 2 quarts of broth. If you’re a little short, add a bit more wine.