Cloud shaped food
From Starfy Wiki
Cotton candy can be found in Skydye Heights where it can be knocked out of cotton candy plants with a Star Spin. Cotton candy can be used to feed a Fluffy Unu, or the one Giant Clam. If Starfy or Starly get stuck in the cotton candy plants, they must rapidly push the left and right buttons on the D-Pad to wiggle free. The Toy description for Fluffy Unu suggests that cotton candy is its favorite food.