What is how does diatoms move?

Diatoms move through a process called "gliding." They do not have true motility like animals, but they can slide along surfaces or waddle through water by secreting a type of mucilage that acts as a lubricant. The movement is also aided by tiny hair-like extensions called "pseudopodia" that allow them to inch forward. Diatoms can also change their buoyancy to move vertically in water by managing the amount of gas in their chambers. The movement of diatoms is relatively slow and non-directional, and it primarily serves to help them find optimal conditions for growth and reproduction.