Marine notches are indentations or undercuttings, few centimeters to several meters deep, cut in steep rocky coasts at various levels by different processes[20]. Researchers have divided marine notches into tidal notches, surf notches, infralittoral notches, abrasion notches, structural notches. Tidal notches are cut at tide level on calcareous cliffs, and have the same amplitude as the local tide. The processes leading to tidal notch formation are debated[20] and researchers have ascribed major roles to chemical dissolution, biological erosion and/or wave action. A tidal notch is characterized by morphological elements, that are characteristic of the mechanism and environment of formation. The morphology of a tidal notch can be modified by wave and surf regime, variation in bedrock resistance and relative sea level history[21][20].The transition between tidal notches, formed in quiet conditions, to surf notches, formed in more turbulent conditions, is continuous rather than abrupt. In general, surf notches are wider than the local tidal range and are often characterized by a surf bench that is the result of bio-protective action of calcareous algae or vermetids[22]. Infralittoral notches are cut by biological agents below tidal level, and are generally wider and narrower than tidal or surf notches.