Conus geographus   Linnaeus,  1758 (Sea Snail)
Organism information awaits expert curation
Class: Gastropoda

Size: 65-166 mm

Color: Ground colour white, suffused with bluish grey, violet or pink.

Last whorl with fine, often incomplete network of tan to dark reddish brown lines and small often tent-like spots. Aperture is bluish white and wider. Shell is thin, and light. Moderately large to large, moderately solid to solid; relative weight may vary by 60% in specimens of the same size. Last whorl narrowly cylindrical to cylindrical; outline straight or slightly convex and nearly parallel-sided centrally, slightly concave to convex above and convex (right side) or concave (left side) below. Aperture wider at base than near shoulder. Shoulder angulate to rounded, usually strongly tuberculate. Spire low, outline variably concave to straight. Larval shell of 2.5-3 whorls, maximum diameter 0.9-1.0 mm. Postnuclear whorls tuberculate, tubercles strong and pointed upward in late whorls. Teleoconch sutural ramps concave, with 0-2 increasing to 4-5 spiral grooves in early whorls; closely set axial striae and many spiral striae produce a minutely granulose surface in later whorls. Last whorl nearly smooth except for weak spiral ribs or ribbons near base of subadults.

Synonym (s)

Common Name (s)
• Geography Cone (English)
• Geographer Cone (English)
Economic Importance and Threats

Habitat:  Reef Associated,Sandy
Trophic Level:  Secondary Consumer
Prey:  Fishes, sometimes also on molluscs


• Andaman and Nicobar Islands, Andaman (Lat: 10) (Long: 93) INDIA
• Andaman and Nicobar Islands, Nicobar Islands (Lat: 7) (Long: 93) INDIA
• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.77) INDIA
• Pondicherry INDIA
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu, Rameswaram INDIA
• Tamil Nadu, Keezha Karai INDIA

Literature Source(s)
  • (2002) Lakshadweep Islands biodiversity strategy and action plan (Version: 3)
  • Subba Rao, NV (2003) Indian seashells Records of the Zoological Survey of India ZSI, Kolkata (Part 1) 416 pp Available at - NCL, Pune
  • 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
  • Apte,D (1998) The book of Indian shells Oxford University Press 115
  • Subba Rao, NV and Dey, A (2000) Catalogue of marine molluscs of Andaman and Nicobar Islands Occasional paper no 187 Records of the Zoological Survey of India ZSI 1-323 Available at - NCL, Pune
  • OBIS Indo-Pacific molluscan database Available at -
  • Lee, JK (1985) Poisonous cone claims life in Mauritius Hawaiian Shell News 33(12) 4 Available at - ZOOR12200039925
  • Fernando, AS and Fernando, OJ (2002) A field guide to the common invertebrates of the east coast of India Centre of Advanced Study in Marine Biology 1-258 Available at - NIO, RC Kochi
  • Kasinathan, R; Singarawadivelan, G and Saminathan, R (1997) Venomous cone snails of southeast coast of India 1 Available at - NIO, Goa
  • Kohn, AJ The Conus Biodiversity website Available at -
  • Eddie, H Hardy's internet guide to marine gastropods Available at -
  • Sundaram, KS; Sarvesan, R; Mohamed, KH and Shanbhogue, SL (1969) Catalogue of molluscs, prawns, stomatopods and marine algae in the reference collections of the central marine fisheries research institute Bulletin Of Central Marine Fisheries Research Institute CMFRI, Cochin 9 1-52 Available at -

Page last updated on:2011-03-11

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