Sharpnose sevengill shark (Heptranchias perlo) fish species and Sharpnose sevengill shark information

Scientific Name
Heptranchias perlo

Common Name
Sharpnose sevengill shark

Biology
Found on the outer continental and insular shelves and upper slopes in depths of 100 to 400 , also inshore and down to 1,000 m. Feeds on small sharks and rays, small bony fish, shrimps, crabs, lobsters, squid, and cuttlefish. Ovoviviparous , with 9-12 young born per litter. Very active and aggressive when captured and quick to bite but too small to be very dangerous to people. Liver utilized as a source of oil. Maximum length may reach 214 cm, but this is uncertain.

Classification

Classified By

Bonnaterre, 1788

Class

Sharks and Rays (Elasmobranchii)

Order

Frill and cow sharks (Hexanchiformes)

Family

Cow sharks (Hexanchidae)

Distribution

Region

Circumglobal in tropical and temperate seas, excluding the northeast Pacific (Ref. 13573). Western Atlantic

Distribution

Circumglobal in tropical and temperate seas, excluding the northeast Pacific. Western Atlantic: North Carolina, USA and northern Gulf of Mexico to Cuba, then from Venezuela to Argentina. Eastern Atlantic: Morocco to Namibia, including the Mediterranean Sea. Indian Ocean: southwestern India, Aldabra Island, southern Mozambique, and South Africa. Western Pacific: Japan to China, Indonesia, Australia and New Zealand. Southeast Pacific: off northern Chile.

Range

58°N - 58°S, 98°W - 173°W

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

1000 m

Zone

bathydemersal

Environment

Marine; bathydemersal; depth range 0 - 1000 m , usually 180 - 450 m

Trophic Level

4.16 s.e. 0.58 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

137 cm

Common Length

100.0 cm

Phylogenetic Diversity Index

PD50 = 1.0781 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: minor commercial

Vulnerability

High to very high vulnerability (73 of 100)

Resilience

Very Low, minimum population doubling time more than 14 years (Fec=9)

Threat To Humans

Poisonous to eat (Ref. 4690)

IUCN Red List Status

Near Threatened (NT)

Sharpnose sevengill shark (Heptranchias perlo) fish species and information / pictures of Sharpnose sevengill shark - Heptranchias perlo

Sharpnose sevengill shark (Heptranchias perlo) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population