Safe Passage Seafood Chowder

Name: Safe Passage Seafood Chowder
Ingredients: 3 tablespoons olive oil, divided; 1 pound halibut fillet, seasoned with salt and pepper; 1 pound 3 to 40 shrimp, deveined and shell and tails removed; 1 pound bay scallops; 6 dozen fresh mussels, well scrubbed; 1/2 cup water; 1 3/4 cups butter (3 1/2 sticks); 2 cups medium diced celery (5 to 6 stalks); 2 cups medium diced onions (2 to 3 large onions); 1 3/4 cups all-purpose flour; 1 quart clam juice; 1 pint fish stock; 6 large carrots, peeled and diced medium; 3 tablespoons minced fresh parsley leaves; 3 teaspoons salt; 2 teaspoons pepper; 2 tablespoons crab boil seasoning (recommended: Old Bay)