Shorefishes of the Greater Caribbean online information system

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Species: Carcharhinus signatus, Night Shark

All Families:   All Genera:   All Species:

snout long, narrow, pointed
eye large, green
D1 low, long rear tip, origin/behind over pectoral inner tip
uniform color
pectoral small, narrow

Carcharhinus signatus (Poey, 1868)

Night Shark

Body fusiform and slender; snout long, (length > mouth width, 1.7-1.9 in the distance between nostrils), narrow, pointed; eyes round, large, nictitating eyelid present; nasal flap short with narrow base; mouth small; very short labial folds; upper teeth with oblique point, front edge smooth or with finely serrated base, rear edge notched, with 2-5 strong serrae at base; lower teeth with a narrow upright point; spiracles absent; gill slits short, last two over pectoral fin base; first dorsal low, with long rear tip, front edge weakly convex, rear margin concave, origin over or behind free rear tip of pectoral; second dorsal very low, elongate rear tip, origin over anal fin origin; low ridge present between dorsal fins; pectoral fins small, narrow; tail base without keel; tail fin strongly asymmetrical, with well developed lower lobe, undulating ridge along dorsal surface of top lobe, and a notch under tip of that lobe.

Greyish blue above, greyish white below; eyes green; inside mouth white; fins unmarked.

Size: 280 cm.

Coastal and semioceanic.

Depth: 0-600 m, usually 50-100 m.

E & W Atlantic, with unconfirmed reports off the E Pacific; Delaware to Brazil.

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  • Marine
  • Marine Only
  • In & Offshore
  • Inshore
  • Offshore
Water Column Position
  • Bottom
  • Bottom + water column
  • Mid Water
  • Near Bottom
  • Near Surface
  • Surface
  • Water column
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Octopus/squid/cuttlefish
Egg Type
  • Data
  • Live birth
  • No pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • Transatlantic (East+West Atlantic)
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Extends N + S of GC
  • Extends North of GC
  • Extends South 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
  • Vulnerable
  • Not listed
Length Max
  • 280
Depth Range Min
  • 0
Depth Range Max
  • 600