Harpago arthriticus, common name : the arthritic spider conch, is a species of sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs. Description The size of an adult shell varies between and . Distribution This species is distributed in the Indian Ocean along the Aldabra Atoll, Kenya, Madagascar, the Maldives, the Mascarene Basin, Mauritius, Mozambique, Réunion, the Seychelles and Tanzania; in the Pacific Ocean along the Philippines. References Taylor, J.D. (1973). Provisional list of the mollusca of Aldabra Atoll Richmond, M. (Ed.) (1997). A guide to the seashores of Eastern Africa and the Western Indian Ocean islands. Sida/Department for Research Cooperation, SAREC: Stockholm, Sweden. . 448 pp. External links Strombidae Gastropods described in 1798