Curried Crab with Coconut and Chili

Name: Curried Crab with Coconut and Chili
Ingredients: 2 1/4 pounds live crab; 1/4 cup coriander seeds; 1 1/2 tablespoons cumin seeds; 1 tablespoon whole black peppercorns; Sea salt; 5 1/2 ounces white wine vinegar; 2 ounces desiccated coconut; 1 tablespoon finely grated fresh ginger; 5 garlic cloves; 1 large green chile, chopped; 1 white onion, chopped; 1 tablespoon canola oil; 1 medium ripe tomato, diced; 10 fresh curry leaves; 1/2 ounce fresh turmeric, peeled and finely grated; 1 tablespoon chile powder; 9 ounces unsweetened coconut milk