New Super Luigi U: Acorn Plains- Cheep-Cheep -- Cheep Chomp Chase

This water level has a lot of pipes. There is an invisible block over the red pipe with a Starman. Get it and go through the red pipe. There are lots of Cheep-Cheep as well as Big Bertha, the man-eating fish. Swim to the left, between the pipes, for the first Star Coin. The big item block below has another Starman. There's a Red Coin Ring between some pipes. Follow the coins, then swim up, over where the last Red Coin is and the second Star Coin will drop down from the gap in the pipes. Swim up through the gap to reach a new area with the third Star Coin. Keep going to the right, over the pipes and you'll see some rotating pipes. This will take you to the flagpole. This will open the path to Soda Jungle-1.