Drain pineapple, reserving juice. Add cold water to juice to measure 1 cup. Stir boiling water into gelatin in a large bowl 2 minutes or until completely dissolved. Stir in measured liquid. Refrigerate 1 hour or until slightly thickened.

Stir in Cool Whip with wire wisk until smooth. Refrigerate 10 minutes or until mixture will mound. Stir in pineapple, oranges, marshmallows and coconut. Spoon into a 6 cup mold. Refrigerate 3 hours or until firm. Unmold.