littoral zone

The littoral zone is the beach area between high and low tides. It also refers to the benthic division – between high tide and a depth of 200 meters (656 feet). The larger zone is divided into the eulittoral, from high tide to a 50 meters (164 feet) depth, and the sublittoral, from 50–200 meters (164–656 feet). The lower edge of the eulittoral is the lowest limit at which abundant attached plants can grow. See also littoral fauna.