Bring a pot of water to a boil and blanch the shrimp for 2 minutes until pink and opaque.
Immediately transfer the shrimp to an ice bath to stop the cooking process and preserve the snap.
Drain the chilled shrimp, pat dry, and chop into bite-sized pieces before placing them in a glass bowl.
Add the diced cucumber, red onion, tomato, and minced jalapeño to the shrimp.
In a small bowl, whisk together the lime juice, olive oil, sea salt, black pepper, and garlic powder.
Pour the dressing over the shrimp mixture, add the cilantro, and gently fold in the cubed avocado just before serving.