Thaw fish, if frozen. Preheat oven to 450°F. Lightly coat a 13x9x2-inch baking pan with nonstick cooking spray. Rinse fish; pat dry. Cut fish into four serving-size portions. Sprinkle with 1/8 teaspoon salt. Place portions, skin sides up, in pan, tucking under any thin edges. Arrange tomatoes around salmon. Sprinkle tomatoes with Worcestershire sauce, pepper, and 1/8 teaspoon salt.