Sand is ionized by nature in such a storm. The velocity in which it moves is at a higher rate than what you would normally find on the ground in an inert state.
When said blowing sand hits the surface of the water it causes a pooling effect or ripple. So the sand is pulled downward into the water in micro whirlpools almost naked to the common eye.
While this May not effect most life. If one is in shallow water, it is conceivable that these particles can swirl in a counter clockwise direction resulting in the silica particles in sand to become abrasive. Thus soft plant matter, tissue could be harmed by this abrasive phenomenon.
Dependant on the velocity of the wind above, the turbulence of the body of water might also grab debris from the bottom resulting in a deluge which would bring sand, sediment, shell upwards acting like an equally abrasive scouring effect.
Hope this helps