World 3-1 (New Super Mario Bros.)

World 3-1 is the first level of World 3 in New Super Mario Bros.. The level can be bypassed in favor of World 3-A.

Layout
This level starts out with the player standing on a small section of land. Next to this land is a shallow pool of water – within which is a Warp Pipe. The player must go down this pipe in order to continue forth in the level. On the exiting end of the pipe, the player will be completely submerged in water. The first things the player will see are a Big Cheep Cheep and three ? Blocks – each block contains one coin. Five Cheep Cheeps will be encountered shortly thereafter, followed by two Brick Blocks and a ? Block. After a Red Ring is found, several more schools of Cheep Cheeps will be encountered; these can make retrieving all eight Red Coins difficult. Past an abyss, several more coins and a random power-up block. A Cheep Chomp can be encountered just past here. It will try to eat the player as he or she swims through a maze of pipes – a Star Coin can be found here too. An upside-down P-Switch can be found just past here; by pressing it, all nearby brick blocks will turn into coins, allowing access to another Star Coin. Up ahead, yet another Red Ring can be found. Past here, a warp pipe is found; it allows access to ground level, where the Flagpole is located.

Star Coins

 * Star Coin 1 - After the checkpoint, there should be a green pipe between a red pipe and a green pipe spewing bubbles. Enter the green pipe and Mario or Luigi will be transported to a Coin Heaven filled with coin bubbles and Cheep Cheeps. The Star Coin is at the end.
 * Star Coin 2 - Directly after Star Coin 1, this Star Coin is between two pipes that spew bubbles. Take caution of the Cheep Chomp.
 * Star Coin 3 - After hitting the P-Switch, swim all the way to the right where the Star Coin is.

Enemies

 * Cheep Cheep
 * Big Cheep Cheep
 * Cheep Chomp