New Super Mario Bros.: 3-3

This level takes place underwater. This level has lots of Bloopers. Near the start is a 1-up in a hidden block in an alcove. Go down and to the left for the first Star Coin. Near the bottom are three pipes: two green and one yellow. Currents will be coming out of them. An orange ? Switch will temporarily stop the currents so you can go under and left and take the second green pipe down to the second Star Coin. There will be a Blooper Nanny with little Bloopers that will disperse every few seconds. The pipe to exit is in the upper right. Towards the end of the level, you will see an arrow pointing to the end pipe. Drop down and you'll see the third Star Coin. Once you collect it, four Bloopers will appear, so get out of there. The pipe will take you to the flagpole.