Sphyrna tudes   (Valenciennes,  1822) (Fish)
Organism information awaits expert curation
Class: Elasmobranchii

Image copyrights: FAO

Size: Max length 134 cm TL (male/unsexed); 148 cm TL (female)

Dioecious, internal (oviduct) fertilization, internal live bearers. Viviparous, with yolk-sac plazenta; number of young probably 6 - 9 per litter. Size at birth about 30 cm.

Synonym (s)
Sphyrna bigelowi Springer, 1944
(Junior synonym)
Zygaena tudes Valenciennes, 1822
(Senior synonym)

Common Name (s)
• Shark (English)
• Squathheaded Hammerhead (English)
• Kannankodi (Malayalam)
• Magala (Marathi)
• Koma Sorrah (Telugu)
Economic Importance and Threats
Importance:  Commercial
Threats:  Anthropogenic
(Its inshore coastal habitat makes it susceptible to capture and heavy (and increasing) gillnet fishing pressure throughout its range. Also it has a limited reproductive capacity.)

Habitat:  Bentho Pelagic
Trophic Level:  Tertiary Consumer
Prey:  Small bony fishes, including sea catfish, grunts, also newborn scalloped hammerheads, swimming crabs, squids, and shrimp
IUCN Status:  Vulnerable


• Tamil Nadu INDIA
• Kerala INDIA

Literature Source(s)
  • Hanfee, F (1999) Management of shark fisheries in two Indian coastal states: Tamil Nadu and Kerala Case studies of the management of elasmobranch fisheries. FAO Fisheries Technical Paper. No. 378 Rome, FAO Part 1 (11) Available at - http://www.fao.org/docrep/003/X2097E/X2097E14.htm#ch11.
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • (2003) IUCN Red list of threatened species Available at - http://www.iucnredlist.org/

Page last updated on:2010-05-11

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