World 2-2 (Super Mario Bros.)

World 2-2 is the second level of the World 2 of Super Mario Bros. and the sixth level of the game.

About
The player must swim underwater. During this level, they will encounter only three types of enemies: Bloopers, Cheep Cheeps, and one Piranha Plant in the final pipe of the level. The players' only defense in this level are fireballs; in case the player cannot throw them, they must simply avoid the enemies. Though this level is underwater, gaps can still be found. The end of the level features a pipe that takes the player to ground level, where the player can jump on the flagpole. If a player is killed by a Blooper in this level, there will be no more Bloopers when the player starts again.