Poison tide

Poison tides are a type of hazard in the Super Mario franchise that moves up and down.

New Super Mario Bros. 2
Poison tides debut in New Super Mario Bros. 2, appearing in World 3-4 and the Third Course of the Impossible Pack in Coin Rush. It rises quickly and falls gradually.

Super Mario Maker 2
In Super Mario Maker 2, the player can set the level and speed of poison tides.

Captain Toad: Treasure Tracker
In Captain Toad: Treasure Tracker, poison tide only appears in Ghost Gallery Gambit where it rises up constantly.