World 3-5 (Super Mario Bros. 3)
From the Super Mario Wiki
This level takes place mostly underwater. The player starts on a pipe, below are some Jelectros, Cheep-Cheeps and a Big Bertha guarding ? Blocks (one containing a power-up), and Brick Blocks with coins. There are also some pipes blowing wind. Afterwards, there is a Bloober alongside more Jelectros and another Cheep-Cheep, as well as more wind-blowing pipes. One of these pipes leads to a bonus area with three 1-Up Mushrooms. However, the player needs to be Frog Mario, since the wind will always push the player upwards. After this, there are three more ? Blocks with coins and another power-up, followed by another Big Bertha and a Hidden Block with a 1-Up Mushroom. Next is another Cheep-Cheep and a Warp Pipe leading to the goal.