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 Nervous shark (Carcharhinus cautus)

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

 Photo

Nervous shark
No image of Nervous shark found in the Shark Database
 Range Map

Earth Map


 Systematics

Phylum: Vertebates (Chordata)

Class: Carlilagenous Fishes (Chondrichthyes)
  Order: Ground sharks (Carcharhiniformes)
    Family: Requiem sharks (Carcharhinidae)
      Genus: Carcharhinus (Carcharhinus)


 Name

Scientific: Carcharhinus cautus
German: Nervöser Hai
English: Nervous shark
French: Requin nerveux
Spanish: Tiburón nervioso


 Appearance

A typical requiem shark of moderate size. Snout bluntly rounded with horizontal oval eyes. Large and falcate first dorsal fin, with a narrow and pointed apex. Front origin over or slightly in front of pectorals free rear tips. Second dorsal fin is relatively high (3-4% of total body length). Origin of second dorsal fin over origin of anal fin. No interdorsal ridge present.

 Coloration

Greyish-brown or bronze on its back, white belly region. Dorsal, pectoral, and caudal fins have black margins. These black margins expand apically to black tips on caudal lobes and pectorals. A conspicuous white band may be present on the flanks.

 Distribution

Eastern Indian Ocean and Western South Pacific: Australia (Queensland, Western Australia), Solomon Islands, Papua New Guinea.

 Biology

A little known species found over shallow waters of continental and insular shelves. May swim into deeper water, as well.

 Feeding

Bony fishes, and to lesser extent, crustaceans and cephalopods.

 Size

Maximum size about 150 cm, average size between 100 and 130 cm.

 Reproduction

Viviparous, with yolksac placenta (gives birth to live young). Litter size between 1 and 5 pups. Gestation period 8 to 9 months. Size at birth between 35 and 40 cm.

 Similar Species

Similar to Blacktip reef shark but no conspicuous black tips on the first dorsal fin and anal fin.

 Endangerment

Status in the IUCN Red List(Version 2001):

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


 Danger to Humans

Harmless.



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