World 3-A

Enter the pipe to reach a fast-moving underwater stage where the current constantly pushes you to the right, leaving little room for error.

If possible, hit the P switch on the ground and follow the blue coin path, swimming upward and then downward around Cheep Cheeps.

Ahead, you will find ledges dividing the area; take the upper path to obtain Star Coin #1.

Continue with the current until you reach a red pipe at the end. Go down this pipe to enter a calmer room below.

Swim downward into another section through an opening in the floor.

Go right and hit the ? switch to temporarily stop the current blocking access to Star Coin #2, located directly below.

Swim around the thin ledges to grab Star Coin #2, then swim back out to the right.

Hit the block to get a Star, then swim back upward along the current to exit this section.

You can hit the block near the exit to get a Fire Flower if needed. Otherwise, proceed up the pipe.

If you are invincible, it will be very helpful as you must avoid numerous giant urchins while swimming upward.

Hit blocks along the way to get coins as the action moves right again.

Swim through a red ring to activate the red coins. Collecting all of them grants an extra life.

Along this path, you can grab Star Coin #3, which is floating in the lower half of the path.

Continue swimming along the narrow path between the urchins; the green exit pipe will be ahead.

Go through the green exit pipe, then jump up the ledges and collect any last-minute coins before hitting the flagpole to exit the level.