Aqua Pazza

Name: Aqua Pazza
Ingredients: 2 tablespoons olive oil; 2 cloves garlic, peeled and smashed; 1 bulb fennel, halved and sliced thin; 1 red onion, halved and sliced thin; 1/2 teaspoon crushed red pepper flakes; 1 teaspoon kosher salt, divided; 1/2 cup white wine; One 14-ounce can cherry tomatoes; 1 cup water; 2 tablespoon capers; Two 6-ounce filets striped sea bass, skin removed (see Cook's Note); 2 tablespoons chopped fresh Italian parsley; Extra-virgin olive oil, to finish; Crusty bread, for serving