Nates 100 Fish Stew

Name: Nate's $100 Fish Stew
Ingredients: 3 tablespoons olive oil; 1 large fennel bulb, thinly sliced; 1 onion, chopped; 3 large shallots, chopped; 2 teaspoons salt; 4 large garlic cloves, finely chopped; 3⁄4 teaspoon crushed red pepper flakes; 1⁄4 cup tomato paste; 2 (14 1/2 ounce) cans diced fire-roasted tomatoes, with juice; 1 cup dry white wine; 5 cups fish stock; 1 bay leaf; 1⁄2 lb mussels, scrubbed, debearded; 1 lb uncooked large shrimp, peeled and deveined; 1 lb assorted firm-fleshed fish fillet, such as halibut, cut into 2-inch chunks; 1 cup lump crabmeat; freshly grated parmesan cheese