Use a melon ball scoop to create little balls from each of the melons. Place them in a large bowl.
Make the citrus dressing: In a small bowl, combine the lemon juice, lime juice, sea salt, honey and mint. Whisk together. Pour over the melon balls and gently toss until evenly coated. You can serve right away or chill before serving. If you refrigerate it, stir the salad again just before serving.