Sand tide

Sand tides are a type of harmful hazard where sand moves up or down in the Super Mario franchise.

Super Mario World
Sand tides debut in Super Mario World, appearing in Donut Plains 2 and Valley of Bowser 2. Sand tides are sandy yellow platforms varying many different sizes that move up and down.

Super Mario Galaxy
In Super Mario Galaxy, sand tides appear in Dusty Dune Galaxy, where they move up or down when activated. Once all five Silver Stars are collected, sand tides sink and disappear.