Rights concerning properties abutting an ocean, sea or lake rather than a river or stream (riparian). Littoral rights are usually concerned with the use and enjoyment of the shore.
http://www.coreyhughes.com/index_files/definitions.htm
The right of an owner of land with a shoreline contiguous to a sea or lake to use and enjoy the shore without a change in its position created by artificial interference; as distinguished from riparian rights and water rights.
http://www.westopforeclosure.org/glossary.html