Make sure all canned fruits are thoroughly drained. Pat dry with paper towels to remove excess moisture.
In a large mixing bowl, combine sour cream and shredded coconut. Stir until well blended.
Add mini marshmallows, pineapple chunks, mandarin oranges, and cherries to the bowl. Gently fold together until all fruit is evenly coated.
If using pecans, fold them in at this point for a nice crunch.
Cover with plastic wrap and refrigerate for at least 2 hours or overnight. This allows the flavors to meld together beautifully.
Give the salad a gentle stir before serving. Garnish with extra coconut or a cherry on top if desired. Keep refrigerated and enjoy within 3 days.