World 7-2 (Super Mario Bros.)

World 7-2 is the second level of World 7 in Super Mario Bros. and the twenty-sixth level overall in said game, taking place underwater.

Layout
The layout of World 7-2 is similar to World 2-2, but with additional Bloobers and Cheep-cheeps. The player starts with their character walking into a Warp Pipe, which will take them to the underwater portion of the level.

In order to move around in the water, the player needs to press the jump button to propel themselves upward. The player can also walk along the waterbed, but their movement will be slowed. In the water are many Bloobers and Cheep-cheeps that swim around, with Bloobers moving toward the player and the Cheep-cheeps swimming across the screen. Both enemies can also move through platforms and walls. In three locations in the level are areas with strong currents that will pull the player downward, so the player needs to rapidly swim in order to escape; if the player goes too far down, they will lose a life. The Warp Pipe at the end of the stage will take the player to the flagpole, where a Piranha Plant can be found in the pipe the player exited from.

In Super Mario Bros., World 7-2 is where the Minus World glitch level takes place in the NES version.

Super Mario Bros. Deluxe challenges
In Super Mario Bros. Deluxe, the player can collect five Red Coins, find a hidden Yoshi Egg, and get a medal based on their score. The Yoshi Egg is found in a Hidden Block to the left within the third current, and the score to beat is 24000. The Red Coin locations are:
 * Above the first platform
 * At the bottom-left of the first current
 * On top of the third coral after the first current
 * Between two pieces of coral after the second current
 * Above the exit pipe

Enemies
* - There are 14 Blooper spawns in the level, though one of them is located within the green blocks, and thus never spawns in effect.

Level map
Mondo 7-2 (Super Mario Bros.)