Another batch of discoveries in the intertidal zone of the Rhodes estuary 1. Sea urchin shells, no

Another Discovery of Intertidal Zone in Rhodes Estuary
1. Sea urchin shell, I didn’t expect sea urchins would go so deep into the estuary.
2. The remains of the crab. There are often huge crabs in this area.
3. Dense barnacles on stones
4. Petelloida mimula of LiriodendronSydney, Australia