New Super Mario Bros. U: Sparkling Waters- Castle -- Larry's Torpedo Castle

This level features Torpedo Teds in the water, which are similar to Bullet Bills. It also has jet engines spewing flames. There are moving grates which allow to you stay out of the water. Wall jump up when the jet engines are not firing for the first Star Coin. Go up and over the ceiling to a pipe that takes you underwater. Torpedo Teds can't freeze, so just avoid them. You'll soon reach the midpoint. Keep going right, go down behind a grate, and go left for the second Star Coin. Go up the first green pipe where you'll find coins, Red Coins, and more grates. One of the grates moves vertically. Climb on it and jump when it reaches the ceiling to get the third Star Coin, which is hidden. Dodge the jet engines and you'll eventually reach the boss door. There's a Fire Flower on the right wall in an invisible block. Take the cannon to the Airship. Larry's Airship has waterspouts, which can make stomping him difficult. They also affect his movement while he's in his shell. Use the waterspouts to your advantage and stomp him three times to defeat him. His Airship crashes. We have all of the Star Coins in Sparkling Waters. This opens the path to the Soda Jungle, but be careful if you go forward. There's another special level just ahead.