World 4-4 (New Super Mario Bros. Wii)
From the Super Mario Wiki, the Mario encyclopedia
This level begins near a Warp Pipe, which takes the player underwater. Cheep Cheeps and Big Cheep Cheep are found next to a ? Block. The next section contains Spiny Cheep Cheeps, along with Bloopers and a Blooper Nanny in Warp Pipes. More Bloopers are found hiding behind scenery, along with a Red Ring. A Warp Pipe blowing a current of bubbles is before the midway point. Following the midway point, more Warp Pipe currents and Bloopers are encountered. A yellow Warp Pipe is found under a row of Brick Blocks, leading the player to a bonus area, where one of only two Cheep-Chomps in the game can be found. The next section contains many Bloopers, as well as Warp Pipe currents, which can be disabled by a P Switch on the ceiling. A Super Star can be found in a ? Block on the end of a row of Brick Blocks. Many Warp Pipes are found throughout the section, as well as ? Blocks that contain more Super Stars if the player is invincible. A Warp Pipe is found at the end of the area along with a Blooper, taking the player out of the underwater area. The flagpole then follows.