Abstract
The nereidid polychaete Leonnates persicus Wesenberg-Lund originally described from the Percian Gulf is currently known from the Indian Ocean and Western Pacific Oceans. In Japanese waters, it was recorded from the Ariake Sound and Kagoshima, Kyushu, Tokushima, Hyogo, and Mikawa Bay. Here we report a new record of this species from shallow water locations of Haneda, Tokyo Bay.