Shorefishes of the Greater Caribbean online information system

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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.

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

Circumglobal, tropical to temperate; N Carolina to Argentina.

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