In a medium bowl combine lemon juice, lime juice, vinegar and oil.
Mix and strain out seeds or pulp. Set aside.
Prepare the fresh fish by trimming off skin, fat and picking out any bones. Dice.
Chop the fresh shrimp.
Place the salmon and shrimp into the medium mixing bowl with the citrus juice, stir.
Cover with plastic wrap and refrigerate for 20 minutes.
Dice all of the vegetables and combine in a large bowl.
Combine the fish and vegetable mixture, mix well.
Cover with plastic wrap and refrigerate for 10 minutes.
Remove from the fridge and serve with tortilla chips.