In a large mixing bowl, combine chopped fresh shrimp with freshly squeezed lime juice, ensuring each piece is thoroughly coated. Allow the shrimp to marinate for about 5 minutes at room temperature.

Add diced tomatoes, finely chopped onion, and cilantro to the bowl. Gently fold the ingredients together until evenly mixed. Cover and refrigerate for 1 hour to let flavors develop.

Stir in Worcestershire sauce, ketchup, hot sauce, salt, and pepper, adjusting to taste for seasoning.

Carefully fold in diced avocado just before plating. Serve with crunchy saltine crackers or tortilla chips.