How to Make It
Bring a stockpot of water to a boil over high heat. Add shrimp; cook 1 minute or until shrimp just turn pink, adding scallops after shrimp have cooked for 30 seconds. Drain; immediately plunge shrimp and scallops into ice water for 3 minutes or until chilled. Drain.
Combine shrimp, scallops, orange juice, and lime juice in a large glass or ceramic bowl. Cover and refrigerate 30 minutes.
Stir in watermelon and next 5 ingredients. Cover and refrigerate 2 to 4 hours. Stir in mint; serve immediately.