Bluntnose sixgill shark (Hexanchus griseus) fish species and Bluntnose sixgill shark information

Scientific Name
Hexanchus griseus

Common Name
Bluntnose sixgill shark

Biology
Depth range reported at 0m-2000m. A deepwater species of the outer continental and insular shelves and upper slopes (Ref. 6871). Near bottom, occasionally pelagic, adults usually below 91 m (Ref. 58302). Juveniles may be found close inshore (Ref. 6871). Found on the bottom by day, moving to the surface at night to feed, and where it may take longlines set for other species (Ref. 45445). Depth distribution related to growth and temperature, with juveniles having most shallow records and from colder, poleward regions (Ref. 58302). Feeds on a wide range of marine organisms, including other sharks, rays, chimaeras, bony fish, squids, crabs, shrimps, carrion, and even seals. Ovoviviparous (Ref. 205), with 22 to 108 pups in a litter (Ref. 247). Marketed fresh, frozen, or dried salted; also utilized as a source of oil and fishmeal. Not known to have attacked peo

Classification

Classified By

Bonnaterre, 1788

Class

Sharks and Rays (Elasmobranchii)

Order

Frill and cow sharks (Hexanchiformes)

Family

Cow sharks (Hexanchidae)

Distribution

Region

Circumglobal

Distribution

Circumglobal: In tropical and temperate waters; (Ref. 13573). Western Atlantic: North Carolina to Florida (USA) and northern Gulf of Mexico to northern Argentina. Eastern Atlantic: Iceland and Norway to Namibia, including the Mediterranean. Indian Ocean: Madagascar, Mozambique, South Africa, and Arabian Sea (Ref.85183). Western Pacific: eastern Japan to New Zealand and Hawaii. Eastern Pacific: Aleutian Islands, Alaska to Baja California, Mexico; also Chile . Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139, Ref. 41819).

Range

65°N - 48°S, 180°W - 180°E

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

1 m

Depth To - meters

2500 m

Zone

bathydemersal

Environment

Marine; bathydemersal; oceanodromous (Ref. 51243); depth range 1 - 2500 m (Ref. 58302), usually 180 - 1100 m (Ref. 45445)

Trophic Level

4.28 s.e. 0.47 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

482 cm

Common Length

300 cm

Phylogenetic Diversity Index

PD50 = 0.8281 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial; gamefish: yes

Vulnerability

Very high vulnerability (84 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Fec= 22-108)

Threat To Humans

Poisonous to eat (Ref. 4690)

IUCN Red List Status

Near Threatened (NT)

Bluntnose sixgill shark (Hexanchus griseus) fish species and information / pictures of Bluntnose sixgill shark - Hexanchus griseus

Bluntnose sixgill shark (Hexanchus griseus) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population