Tonna olearium [Status Unaccepted]   (Linnaeus,  1758) (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Color: Pale brown, marked with numerous chestnut spots.

Shell thin, moderate-sized, with a large, very strongly inflated body whorl and a short spire. The base of the shell is broad; sutures are well sunk in deep channel-like grooves; surface is strongly traversed by shallow, somewhat widely spaced spiral grooves, separated by broad, flattened interspaces, feebly raised to form definite ribs. The columella is almost straight the umbilicus very much reduced. The edge of the outer lip is simple, not thickened.

Synonym (s)

Common Name (s)
• Tun Shell
Economic Importance and Threats



• Tamil Nadu, Shingle Island (Lat: 9.23) (Long: 79.23) INDIA
• Tamil Nadu, Krusadai Island (Lat: 9.23) (Long: 79.22) INDIA

Literature Source(s)
  • (2002) Lakshadweep Islands biodiversity strategy and action plan (Version: 3)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Mayhew, R Schooner specimen shells Available at -
  • Satyamurti, ST (1952) The Mollusca of Krusadai island in the Gulf of Mannar I- Amphineura and Gastropoda Bulletin of the Madras Government 1(2) 265 pp Available at - NIO, Goa

Page last updated on:2013-02-13

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