High-resolution Synthetic Aperture Radar (SAR) data of dry-fallen intertidal flats have been analyzed with respect to the imaging of sediments, macrophytes, and mussels in the German Wadden Sea. A great number of TerraSAR-X and Radarsat-2 images of five test areas along the German North Sea coast were acquired in 2012 and 2013 and form the basis for the present investigation. Depending on the type of sediment, but also on the water level and on environmental conditions (wind speed) exposed sediments may show up on SAR imagery as areas of enhanced radar backscattering. The (multi-temporal) analysis of series of such images allows for the detection of mussel beds, and our results show evidence that also single-acquisition, multi-polarization SAR imagery can be used for that purpose.