World 8-4 (New Super Mario Bros. Wii)

After falling down a deep tunnel, Mario and Co. will have to deal with several Stone Spikes. There are Bulbers in the water, which help the player see. The second part of the level is infested with Jellybeams. They are the only light source in this section of the level. For the final part, the player will have to swim upwards through some pipes that make strong water currents. After entering a pipe the exit will be close.

Enemies

 * Bulbers
 * Stone Spikes
 * Jellybeams
 * Cheep-Cheeps
 * Deep-Cheeps
 * Bloopers