low tide mark
Ocean's retreat line
The low tide mark is the line on a shore reached by the water at its lowest ebb.
It serves as a legal and navigational boundary, often marking where public beach access ends or where maritime jurisdiction begins.
The area between low tide mark and high tide mark is the intertidal zone, alternately submerged and exposed.
- tidelineShore's flood boundary
- watermarkTranslucent authentication mark
- shorelineLand-water boundary
- low waterMinimum tide level
- ebbGradual retreat seaward
slack water · seaweed · rockpool · exposed · rock pool · barnacles · mussels · strand · wrack · neap · flotsam · sand · mudflat · kelp · debris · beach combing · receding · coastal