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 Broadnose sevengill shark (Notorynchus cepedianus)

  Index
> Photo
> Range Map
> Systematics
> Name
> Appearance
> Coloration
> Distribution
> Biology
> Feeding
> Size
> Reproduction
> Similar Species
> Endangerment
> Danger to Humans

 Photo

Broadnose sevengill shark
No image of Broadnose sevengill shark found in the Shark Database
 Range Map

Earth Map


 Systematics

Phylum: Vertebates (Chordata)

Class: Carlilagenous Fishes (Chondrichthyes)
  Order: Frilled and cow sharks (Hexanchiformes)
    Family: Cow sharks (Hexanchidae)
      Genus: Notorynchus (Notorynchus)


 Name

Scientific: Notorynchus cepedianus
Synonyms: Notorynchus pectorosus
German: Breitnasen-Siebenkiemerhai
English: Broadnose sevengill shark, Ground shark, Cow shark, Broad snout
French: Platnez
Spanish: Canbota gata


 Appearance

Large shark with 7 pairs of gill slits. Broad and rounded snout with small eyes. One dorsal fin.

 Coloration

Grey, with ventral surface. Numerous dark spots on body.

 Distribution

Wide-ranged in temperate waters. Western Atlantic: southern Brazil, Argentina. Eastern Atlantic: Namibia to South Africa. Western Pacific: Japan, Korea, China, Australia, New Zealand. Eastern Pacific: Canada to California, Mexico, Peru, Chile.

 Biology

Primarily a benthic shark found over the continental shelves down to depths of about 50 m, but has also been found in shallow waters. Bigger animals prefer deeper waters. Very active swimmer, often cruising slowly near the bottom. This species apparently coordinates its movements in bays with tidal cycles, moving in with a tidal rise and out with its fall. A very powerful shark.

 Feeding

Feeds on fishes (such as salmon, sturgeon, herring), other sharks (dogfish, houndsharks) and rays (mainly eagle rays).

 Size

Average size about 200 cm to 250 cm, maximum total length about 300 cm.

 Reproduction

Aplacental viviparous (ovoviviparous). High number of offsprings. A female was once found with 82 pups. Size at birth is 45 cm to 50 cm. Males reach sexual maturity at 150 cm to 180 cm, females at 190 cm to 210 cm.

 Similar Species

Can be mistaken for the One-finned shark , that has no distinctive color (no black spots over body), has big eyes and is much smaller.

 Endangerment

Status in the IUCN Red List(1994):

Main criterion: > DD (Data Deficient)
Sub criterion:
Trend: Unknown


 Danger to Humans

Potentially dangerous.



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