marine supra-littoral zone 2010-03-17T09:01:45Z ENVO ENVO:01000124 ORCID:0000-0002-4366-3088 The supralittoral zone is the area above the spring high tide line that is regularly splashed, but not submerged by ocean water. Seawater penetrates these elevated areas only during storms with high tides. marine supralittoral zone splash zone spray zone supralittoral zone supratidal zone environmental zone