Pipeline Lagoon is a level located in World 3 of Super Mario 3D World.
The first real water level of the game, Pipeline Lagoon starts off with a new variant of Goomba that relaxes in its innertube until you get close. As you progress through the level, you will see other mechanics and enemies, such as the Cannon Box, Porcupuffers, Clear Pipes, Cheep Cheeps, and more.
- Green Star 1: At the end of the first underwater section, swim up in a hidden alcove before going into the exit pipe to get the star. You might have to wait for the water level to rise.
- Green Star 2: After getting the stamp, go on the right side of the room to get a cannon box for the star. Swim to the bottom to break open a crack in the wall. It reveals a pipe leading to a hidden area with the star.
- Green Star 3: After passing the last set of Porcu-Puffers, swim up the shaft and go in the clear pipe in the wall leading to a hidden room. Once there, swim to the right side to get the star.
After the checkpoint, swim up in between to high red bricks to get the star on the left. You might have to wait for the water level to rise.