French In A Flash: Bouillabaisse Pasta

Name: French In A Flash: Bouillabaisse Pasta
Ingredients: 1 pound tagliatelle; 1 1/2 tablespoons olive oil; 3 cloves garlic, chopped; 1 large shallot, finely diced; 1/2 small fennel, thinly sliced; 1 15-ounce can of cherry tomatoes, drained (substitute with 1 can petite-diced tomatoes, drained); 3/4 pound grams Poularde clams, or other small clams; 1 pound mussels; 2/3 pound large shrimp, peeled and deveined; 3 ounces crab meat; 3/4 cup dry white wine; 3/4 cup fish stock; 2 pinches (0.3 grams) saffron threads; 1 tablespoon butter, cold