Blunt-nosed six-gill shark

Six gill shark is a redirect to this article. For the other species of the six gill shark, see bigeye six gill shark .

Blunt-nosed six-gill shark
Blunt-nosed six gill shark ( Hexanchus griseus )
Systematics
without rank: Sharks (selachii) Superordinate : Squalomorphii Order : Hexanchiformes Family : Comb tooth sharks (Hexanchidae) Genre : Six-gill sharks ( Hexanchus ) Type : Blunt-nosed six-gill shark
Scientific name
Hexanchus griseus
( Bonnaterre , 1788)

The blunt-nosed six-gill shark ( Hexanchus griseus ) belongs to the order of the Hexanchiformes .

Appearance

The shark, which can be more than 5 meters tall, is massive. The dorsal fin sits far back. The heteroccal caudal fin has a large upper and a very small lower lobe. It is named after the six gill slits, which all lie in front of the attachment of the pectoral fin and get smaller and smaller from front to back. The six-gill shark has large, green fluorescent eyes, the mouth crack is long and wide. It is from light gray to black, brownish or ocher in color. The ventral side and the underside of the pectoral fins are light. Sometimes the fins have white rear edges.

Teeth of the snub-nosed sixgill shark

The teeth of the upper jaw are small and pointed. In addition to a main peak, there can be up to three secondary peaks. The teeth in the lower jaw are comb-shaped and have up to 11 smaller tips that get smaller and smaller towards the back. They are larger than those of the upper jaw.

distribution

Distribution of the snub-nosed six-gill shark

The snub-nosed six-gill shark is found worldwide, in the Atlantic , Pacific , Indian Ocean and also in the Mediterranean . It prefers to stay close to the ground on continental slopes and island bases at depths of 0 to 2500 meters.

Way of life

The sharks are nocturnal, slow swimmers. They feed on bony fish , smaller cartilaginous fish, crustaceans , cephalopods and other molluscs , sea ​​urchins , carrion and marine mammals. Six-gill sharks are viviparous. They get up to 100 young per litter. Attacks on humans are not known. According to UNCLOS , this species is classified as a "highly migratory species".

literature

• Alessandro DeMaddalena, Harald Bänsch: Sharks in the Mediterranean . Franckh-Kosmos Verlag, Stuttgart 2005, ISBN 978-3-440-10458-3 .

Web links

Commons : Blunt-nosed six-gill shark  - Collection of images, videos and audio files

• Blunt-nosed six-gill shark on Fishbase.org (English)
• Hexanchus griseus inthe IUCN 2013 Red List of Threatened Species . Listed by: Cook, SF & Compagno, LJV, 2005. Retrieved September 20, 2013.

Single receipts

1. ↑ Blunt-nosed six-gill shark on Fishbase.org (English)