New Super Luigi U: Sparkling Waters-5 -- Dragoneel Depths

It's time to deal with Dragoneels again. Take the pipe underwater. The first Dragoneel will appear from the left. It will not follow you as closely. To the right, on the shelf on the rocks are a group of Urchins guarding the first Star Coin. Kill them to get is. Fireballs will work. Swim up and you'll see blocks and crates moving in circles. The second Star Coin is in the center of some circling crates with Urchins. Swim carefully to get it. Swim to the upper right and you'll see a green pipe. Ignore the green pipe and let the Dragoneel kill the giant Urchin to the left. This will let you take a pipe to the third Star Coin and the flag. The green pipe leads only to the flag.