Citrus Shrimp Salad

Name: Citrus Shrimp Salad
Ingredients: 2 large navel oranges; 1 tablespoon heavy cream; 1 tablespoon rice vinegar or white wine vinegar; 2 teaspoons Dijon mustard; Kosher salt and freshly ground black pepper; 2 tablespoons extra-virgin olive oil; 1 1/4 pounds extra-large shrimp, peeled and deveined, tails removed; 1/2 teaspoon Old Bay seasoning; Kosher salt; 1 large ripe avocado, pitted and diced; 1 Persian cucumber, thinly sliced into half moons; 1 medium bulb fennel, trimmed, quartered, cored and very thinly sliced (on a mandoline or by hand), fronds reserved for garnish; 2 heads butter lettuce, trimmed and torn into bite-size pieces