Spiral Ditchgrass is an aquatic species that can be found, due to its high tolerance to salt, in pools, salt basins and salt ditches, where the sea salt content can be very high indeed.
The plant has no more than 1 mm wide leaves. When fruits are ripe, the 4 to 30 cm long inflorescence stalk is in most cases distinctly spirally twisted. During the flowering phase, small whitish flowers can be seen above the water. These plants create an important habitat for numerous water species, including ducks which feed on them. They flower from May till October.