The area where the opihi's rocks stood was, as usual, near the high tide mark since opihis like to live submerged sometimes and high, but NOT dry sometimes.
And, very lucky for my investigation, the rocks were surrounded by nice, yellow sand.
Almost immediately I noticed footprints--faded in the moving water--but still visible in the sand surrounding the opihi's rocks!
And these footprints I could easily identify--because to my great surprise, they were CRAB footprints!
Crabs of my own kind--but young! Younger than me, for sure!
Was it possible that a CRAB was making the mysterious marks on the mollusk shells?!