From the upper beach to the lower sub-tidal zone, vegetation growth appears in the order of:
Sandwort, beach pea, then kinnikinnick
Grasses, beach pea, then kelp
Searocket, kelp, then giant vetch

Scuba divers may expect to bring back:
Anemones and starfish
Cormorants and oystercatchers
Crab and abalone

Lower sea levels during the last period of glaciation would be an explanation for:
The evolution of distinct sub-species
The near extinction of the sea otter
The richness of early native culture