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Species: Hexanchus griseus, Bluntnose sixgill shark

All Families:   All Genera:   All Species:

body large, heavy
head wide, rounded
eye small
LL and fin borders pale
D near C
6 gill slits
6 rows lower teeth

Hexanchus griseus (Bonnaterre, 1788)

Bluntnose sixgill shark

Large, heavy body; head and snout wide, rounded; eyes relatively small;  mouth narrow, strongly arched; upper teeth small, with 1 large oblique point, narrow, hooked at front, progressively wider and more comb-like on sides; lower teeth comb-like (long, low, serrated, oblique cutting edge), large lower teeth in 6 rows; six large gill slits, none over pectoral base; 1 dorsal fin, at rear of body, close to tail fin (separated from tail fin base by a distance ~equal to the length of its base; tail very asymmetrical, lower lobe not strongly developed, weak notch under top tip.

Grey to black above, paler to white below, sometimes dark spots on sides; eyes green;  lateral line pale; rear edges of fins pale.

Size: 482 cm.

Habitat: demersal and mid-water; rarely in rivers.  

Dept: 0-2500 m, usually 500-1100 m.

Circumglobal, tropical to temperate; N Carolina to Argentina.


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Salinity
  • Marine Only
  • Marine
Inshore/Offshore
  • In & Offshore
  • Offshore
  • Inshore
Water Column Position
  • Bottom
  • Near Bottom
  • Bottom + water column
Habitat
  • Water column
  • Sand & gravel
  • Rocks
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Bathydemersal
Feeding Group
  • Carnivore
  • Data
Diet
  • Sharks/rays
  • Bony fishes
  • Sea snakes/mammals/turtles/birds
  • Mobile benthic crustacea (shrimps/crabs)
  • Octopus/squid/cuttlefish
Egg Type
  • No pelagic phase
  • Live birth
  • No pelagic larva
Global Endemism
  • Greater Caribbean non-endemic
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
Regional Endemism
  • Continent + Island (s)
  • Island (s)
  • GC non-endemic
  • Continent
  • Extends North of GC
  • Continental primarily
Residency
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Temperate (>35N)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Listed
  • Near threatened
CITES
  • Not listed
Length Max
  • 482
Depth Range Min
  • 0
Depth Range Max
  • 2500