Peel the shrimp, saving only the bodies; rinse them under running water and pat them dry with a paper towel. Cut them into small pieces and season with salt, pepper, and oil. Trim the ends of the cucumber, peel it and remove the seeds, and slice it into ribbons using a potato peeler. Trim and peel the melon, then cut it into 1/2-inch cubes. Top them with oil, salt, pepper, and a pinch of paprika. Place the shrimp and melon into dishes, add the sliced almonds, top with the cucumber ribbons, and finish with a bit more paprika. Serve as desired with crackers.