What are these domes ?!

by Kazu

Many tide pools could be seen from the trail on the island" Kamome-jima". There must be a variety of creatures in them.

This is one of the most popular fishing point and so huge halibut can be landed around this area, based on the talk of a big-mouth in the town.

While I walked around on the island, I found curious rocks on the flat area on the island. What do you think of the "objects" on the rocks ?