This zone consists of two segments: dry land (beaches and forest) adjacent to the water and the intertidal zone that is flooded by high tide twice each day.
The exposed bedrock of the cobble/boulder shoreline and shallows provides ideal habitat for barnacles, mussels and rockweed.
Twice daily the tide comes in and twice daily it goes out again. The difference between high and low tide can be as much as five metres.
High and low tide seen from the Causeway. Sea level may change up to five metres in heigh and the sea may retreat as much as 100 metres. Photos: Bob Turner
Low tides expose many marine creatures . This is when land animals like crows join foraging gulls turning over rocks for crabs and digging holes looking for succulent clams.
The bay’s small beaches not only attract human bathers in the summer months, they are year round resting places for resident water birds and weary migrants who stop by to forage for a meal.