Salt mushroom cutting apparatus for removing salt mushrooms from a water body, comprises a vessel floatable on the water body, and a helical cutter carried by the vessel forwardly of its bow and extending transversely thereof for pulverizing the salt bodies as the vessel is propelled forwardly through the water body. The helical cutter is wider than the vessel and includes a drum rotated about its longitudinal axis, and a helical array of cutter tips projecting from the outer surface of the drum. The propelling means includes at least one pair of spuds on the opposite sides of the vessel, a vertical drive for lowering the spuds into the water bed, and a horizontal drive for driving the vessel forwardly with respect to the spuds when anchored in the water bed.