World 4-3 (New Super Mario Bros.)

World 4-3 is the third level of World 4 in New Super Mario Bros..

Layout
This level takes place underwater. The player should begin by entering the pipe to go underwater. Then, the level will start auto-scrolling. The player must maneuver through the water while avoiding the Regular and Mega Unagi. The first Star Coin is in a little crevace about a quarter into the level. After the coin is a Red Coin Ring. The second Star Coin is found about halfway into the level between two Unagi. If the player presses the ? Switch and then goes into the green pipe that is next to the yellow pipe, they will find the final Star Coin. After going through the Exit Pipe, Mario will reach the Flagpole.

Star Coins

 * Star Coin 1 - After the first Mega Unagi passes, the player should swim to the right and drop down and left to go under a rock formation where they can get the coin. If the player is not fast enough, Mario will be crushed by the scrolling screen and rock.
 * Star Coin 2 - This Coin is located at the bottom of the level between two rock formations, and is guarded by two Unagis.
 * Star Coin 3 - After hitting the ? Switch, the player should enter the lower right green pipe to be transported to an area with two Unagis and a red pipe spewing bubbles. The player should immediately swim over the left of the cave, go down past the Unagi and use the bubbles to get the Coin.

Enemies

 * Goomba
 * Cheep-Cheep
 * Unagi
 * Mega Unagi