My son was up in St. Ignace, Upper Michigan when he seen this rock shining in about two foot of water off shore. He knows how I loves rocks and thought it be a good surprise for me. Boy it sure is and was.. Closely looking at it I found it was covered in tiny eggs. Size is a small metal BB. There are even eggs hidden in the cracks and holes of the rock. I have posted a few pics of it. The rock is about 2'x1 1/2' in size. At least a 1000 eggs or more can be seen. There even looks like a foot print where eggs have been laid in.
If you know what these are, I sure would love to know so I can tell my grandkids the story of their daddy's great rock find.. Thank you ever much for looking.. Possoms