Editing Littoral zone (section)

===Eulittoral zone===
{{See also|Intertidal zone}}

The ''eulittoral zone'' (also called the ''midlittoral'' or ''mediolittoral zone'') is the ''intertidal zone'', known also as the ''foreshore''. It extends from the spring high tide line, which is rarely inundated, to the spring low tide line, which is rarely not inundated. It is alternately exposed and submerged once or twice daily. Organisms living here must be able to withstand the varying conditions of temperature, light, and salinity. Despite this, [[Productivity (ecology)|productivity]] is high in this zone. The wave action and turbulence of recurring tides shape and reform cliffs, gaps and caves, offering a huge range of habitats for sedentary organisms. Protected rocky shorelines usually show a narrow, almost homogenous, eulittoral strip, often marked by the presence of [[barnacle]]s. Exposed sites show a wider extension and are often divided into further zones. For more on this, see [[intertidal ecology]].