Shrimp Ceviche with corn

1 lb medium-small shrimp , peeled and deveined 2 tablespoons salt 3/4 cup lime juice (juice from 4-6 limes) 3/4 cup lemon juice (juice from 2-3 lemons) 1 cup[...]

1 lb cooked shrimp, tails and shell removed 4 large tomatoes , chopped 1 avocado , chopped 1 red onion , diced 1 bunch fresh cilantro , chopped 2 cups tomato[...]