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

World 8-4 is the fourth level of World 8 in New Super Mario Bros. Wii. The level is mostly underwater and is the first and only level in the game to include Jellybeams and Bulbers.

Layout
After falling down a deep tunnel, Mario and company 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 has to swim upwards through some pipes that make strong water currents. After entering a pipe at the end of the area, the flagpole can be found.

There is a secret area in the level, which can be found underneath the last stone spikes in the second room. It has several coins and a Spiny Cheep Cheep.

Star Coins

 * Star Coin 1: The first Star Coin is located in the second area, atop the long platform with the numerous Stone Spikes. Mario and co. must swim to the surface, jump on the platform and avoid all of the Stone Spikes to get it.
 * Star Coin 2 (pictured): In the third area, the second Star Coin, along with four Bloopers, are caged individually by several blocks. Mario and co. must activate the nearby ? Switch to make all of the blocks disappear, then swim to the Star Coin while avoiding the Bloopers.
 * Star Coin 3: In the fourth area, the third Star Coin is in a small opening in the rocks, to the left.

Trivia

 * This is the first level in World 8 to not contain lava, the second being.