Nordic Salmon Soppa

Name: Nordic Salmon Soppa
Ingredients: 1/2 pound skin-on salmon filet; 12-16 raw, wild shrimp with shells; 4 tablespoons salted butter; 1 leek, trimmed, well rinsed, and thinly sliced; 2 carrots, halved and thinly sliced; 4 cups fish stock, chicken stock, or water; 16 mussels; 1 1/2 teaspoons salt (to taste); 1/2 cup fresh dill, chopped and divided; 2/3 cup heavy cream; 1/2 cup Savon Blanc Wine; 1/8 teaspoon freshly grated nutmeg; 1/4 teaspoon pepper; 4 tablespoons cream fraiche, for garnish; 1 bunch chives for garnish