Harpago arthriticus

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 110 mm and 190 mm.

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.