Pour water into a saucepan, salt and bring to a boil, add peeled shrimp and turn off the water immediately. Let them sit for 3 minutes and then transfer to a cutting board.
Cut shrimp into small pieces and transfer to a bowl, add lemon, orange, and lime juices.
Cut cucumbers, onions into small pieces and chop the chili. Add to shrimp bowl and refrigerate for 60 minutes.
Wash and cut the tomatoes into small pieces, place them in a bowl with the shrimp, add the small diced avocado, chopped cilantro, olive oil, a pinch of salt.
Stir everything well and leave at room temperature for half an hour. If you don’t plan on serving right away, place the bowl in the refrigerator after adding the last ingredients.