Hexanchus griseus   (Bonnaterre,  1788) (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Hexanchiformes
Family:Hexanchidae

Image copyrights: Van Orden, W.

Description
Color: Brown above, paler below and fins white edged.

Sits on the bottom by day, and rise to the surface at night to feed.
A heavily bodied, broad headed six gill shark with very long gill slits. Snout very short and blunt, mouth with 6 rows of lower, bladelike, comb shaped teeth on each side. Anal fin smaller than dorsal fin. Single dorsal fin placed well posterior of body. Dorsal fin base separated from upper caudal fin origin by a distance equal to, or slightly greater than its length.
Feeds on a wide range of marine organisms, including other sharks (conspecifics) rays, chimaeras, bony fishes including dolphinfishes, swordfish & marlin, herring, grenadiers, cod, ling, hake, flounders, gurnards & anglers, as well as squids, crabs, shrimps, carrion and even seals.

Ovoviviparous with 22-108 in a litter. Give birth to almost 100 young.
Not known to have attacked people without provocation.
Sensitive to low light.


Synonym (s)
Hexanchus corinum Jordan & Gilbert, 1880
Hexanchus corinus Jordan & Gilbert, 1880
Hexanchus griseus australis de Buen, 1960
Monopterhinus griseus (Bonnaterre, 1788)
Monopterinus griseus (Bonnaterre, 1788)
Notidanus griseus (Bonnaterre, 1788)
Notidanus monge Risso, 1827
Notidanus vulgaris Perez Canto, 1886
Squalus griseus Bonnaterre, 1788
Squalus vacca Bloch & Schneider, 1801

Common Name (s)
• bluntnose sixgill shark (English)
• six-gill shark (English)
Economic Importance and Threats
Importance:  Commercial, Dangers
(Used for food either fresh, frozen, or dried salted; Also utilized for fishmeal and oil; Poisonous to eat )

Ecology
Habitat:  Pelagic, Open Sea, Coastal
IUCN Status:  NearThreatened

Biogeography


• Kerala, Kochi Fisheries Harbour INDIA
• South West Coast INDIA
• Kerala, Kochi Fisheries Harbour INDIA (Record: 01/2008-06/2009) (Depth: 180-1100 mts)

Literature Source(s)
  • Akhilesh, KV; Hashim, M; Bineesh, KK; Shanis, CPR and Ganga, U (2010) New distributional records of deep-sea sharks from Indian waters Journal of the Marine Biological Association of India Cochin 52(1) 29-34 Available at - http://eprints.cmfri.org.in/5816/1/4.Akh.pdf
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Sealifebase Available at - http://www.sealifebase.org/
  • (2003) IUCN Red list of threatened species Available at - http://www.iucnredlist.org/
  • Dr. Shivaji, A; Dr. Sanjeevan, VN; Saravanane, N; Dr. Shunmugaraj, T and Dr. Gupta, GVM (2010) Achievements of FORV Sagar Sampada 1997-2010 Centre for Marine Living Resources and Ecology, Ministry of earth Sciences, Kochi, India 10-21 Available at - NIO, Goa
  • Akhilesh, KV; Ganga, U; Pillai, NGK; Vivekanandan, E; Bineesh, KK; Shanis, CPR and Hashim, M (2011) Deep-sea fishing for chondrichthyan resources and sustainability concerns-a case study from southwest coast of India Indian Journal of Geo-Marine Sciences NISCAIR 40(3) 347-355 Available at - nopr.niscair.res.in/bitstream/.../1/IJMS%2040(3)%20347-355.pdf

Page last updated on:2012-02-17

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