Mycoplasma mobile is a species of parasitic bacteria that binds to the gills of freshwater fish causing necrosis.

[2] It belongs to the class of Mollicutes which includes bacteria featuring reduced genome sizes that may be parasitic or commensal.

The lack of a peptidoglycan layer within M. mobile creates a flexible cell wall, enabling the bacterium to form a protrusion and glide in a smooth manner.

As a result of this cell wall structure, M. mobile is the fastest moving mycoplasma species recorded.

[4] This process enables M. mobile to move and releases sialylated oligosaccharides (carbohydrates that have reacted with sialic acid) onto the surface of the object in which the cell attaches to.