1Peel and devein the shrimp, then cut them into small pieces.
In a large bowl, combine the shrimp, diced tomatoes, diced onions, diced cucumbers, and chopped cilantro.
Add the lime juice to the mixture and stir well to combine.
Finely chop the jalapeno pepper and add it to the bowl. Mix thoroughly.
Cover the bowl with plastic wrap and refrigerate for at least 1 hour to allow the flavors to meld.
Serve the shrimp ceviche chilled, optionally with tortilla chips or on a bed of lettuce.