Supralittoral Zone

The Supralittoral zone of some of the more accessible shores is highly disturbed due to tourism related development. This is that region of the coast that is permanently exposed to the air, except for occasional wetting by sea spray or high waves. This zone is inhabited by organisms that require wetting with sea water spray.

This zones uppermost horizon and it wet infrequently by spray from waves. It extends approximately +7 feet to its lower limits - mean of all high tides approximately +2.5 feet, slightly below mean sea level.

The barnacle zone is the first clearly demarcated zone at the top of the shore and this zone occurs on almost every shore in the world. Below this zone and marking the beginning of the lower intertidal zone is the clearly marked zone of brown algae.

Within the supralittoral zone, lichen grow on the rocks, as well as any plants that are capable of contending with occasional seas spray. Below this, in the supralittoral fringe, cyanobacteria blue-green algae, grow in a slippery film creating what some biologists call the "black zone", due to the dark color of the algae-covered rocks. Animals that tolerate more air than water live here.

Some include:

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