In a large bowl, combine the shrimp, lemon juice, oil, basil, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Set aside for 10 minutes to allow the flavors to meld. Add the radishes, bell peppers, olives, and Feta. Gently stir to combine. Divide among individual bowls and spoon any remaining liquid over the tops. Serve with the pita chips or cracker bread.
Tip: On the go? Tuck this crunchy seafood salad into a pita or roll it up in flat bread for a wrap.