Large Sea Cave; dimensions  9 " long x 8" wide x 3 " tall;  is a low flat topped sandstone style cave that is reminescent of sea cliffs erroded by the waves. It has 4 openings  including the main one level with the gravel in the front. looking at the top view (second photo); the ground level cave in at the southern side of the photo.  Excellent for adding some interesting exploration spaces for your fish!