In a large punch bowl, dissolve the lime gelatin in boiling water, stirring until completely dissolved.
Allow the gelatin mixture to cool to room temperature, about 10 minutes.
Stir in the cold orange juice gently, then refrigerate until the mixture starts to thicken but is not fully set, about 30 minutes.
Just before serving, slowly stir in the cold seltzer to add fizz.
Add ice cubes to keep the punch chilled.
Spoon dollops of slightly softened orange sherbet into the punch, allowing it to float and create creamy swirls.
Garnish with thin orange and lime slices for a colorful, fresh look.
Serve immediately with a ladle and enjoy the lively, tangy flavors!