Littoral
/ˈlɪtərəl/
Definition 1 of 2
Pro Tip 1/3Shoreline Habitat
Emphasizes that 'littoral' refers to the part of the shore rich in life, not just any coastal area. 
Many littoral ecosystems are under threat from human activity.
Pro Tip 2/3Immediate Vicinity
'Littoral' often signifies the immediate area adjacent to water's edge, rather than inland regions. 
Property prices in the littoral areas tend to be higher due to the view.
Pro Tip 3/3Ecological Zone
'Littoral' can also describe a specific ecological zone that is distinct in biodiversity. 
Marine biologists are studying littoral zones to understand coastal ecosystems.