Chicharrones Fish Tacos with Chipotle Tartar Sauce

Name: Chicharrones Fish Tacos with Chipotle Tartar Sauce
Ingredients: 3/4 cup mayonnaise; 2 garlic cloves, finely chopped; 1 scallion, white and light green parts only, sliced; 1 to 2 chipotles in adobo, seeds removed and finely chopped; 1/2 lime, juiced; Salt; 2 pounds skinless Pacific cod (or other firm, flaky white fish), cut into 1-inch chunks; 4 garlic cloves; 1 teaspoon coarse salt, plus additional for seasoning; 2 tablespoons Worcestershire sauce; Freshly ground black pepper; 1 cup all-purpose flour; Vegetable oil, for frying; 8 (8-inch) flour tortillas; 1 cucumber, peeled, halved lengthwise, seeded, halved crosswise and sliced into 1/2-inch thick strips, for serving; 2 cups arugula, stems removed, for serving; 1 cup fresh cilantro leaves, for serving; 1 ripe Hass avocado, halved, pitted, peeled, and sliced, for serving; 2 oranges, zested, for serving; Lime wedges, for serving