Bring a medium pot of water to a boil and blanch the peeled and deveined shrimp for 2 minutes until just pink and opaque.
Immediately transfer the shrimp to an ice bath to stop the cooking process, then drain and pat dry.
Cut the chilled shrimp into bite-sized pieces and place them in a large glass mixing bowl.
Pour the lime juice over the shrimp and stir to coat, then place in the refrigerator to marinate for 15 minutes.
While the shrimp marinates, finely dice the cucumber, Roma tomato, red onion, and jalapeño.
Add the diced vegetables, chopped cilantro, and extra virgin olive oil to the shrimp mixture.
Carefully pit and dice the avocado, then gently fold it into the bowl to keep the cubes intact.
Season the mixture with sea salt, black pepper, and garlic powder, tossing lightly until well combined.
Serve immediately in chilled bowls or over a bed of mixed greens for a clean, satisfying meal.