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Species: Apristurus riveri, Broadgill Cat Shark

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D1 origin over rear 1/4 pelvic base
D1 ~1/2 size D2

Apristurus riveri Bigelow & Schroder, 1944

Broadgill Cat Shark

Body soft and flabby, with thin skin, slender; head broad, flattened, pointed and wedge shaped in side view; snout long, narrow, bell shaped, 7-10% TL, longer than mouth width; pore band on underside of center of snout with only 4 pore rows at level of rear end of nostrils (vs 8+ in other species); skull without crests above eyes; mouth very long, reaches well past eyes, arched; males with much longer and wider mouths; teeth dimorphic: conical in males, multipointed in females; lip furrows very long, upper furrows reach level of front of jaws, lower furrows ~as long as uppers; nostrils small; eyes relatively small (orbit length ~3.3-3.5% TL, high on sides of head, with a crest below them; 5 gill slits, on sides of head, enlarged, widest nearly = eye; 2 dorsal fins at rear of body, without spines; 1st dorsal much smaller than second, origin over rear 1/2 of base of pelvics; origin of 2nd dorsal over ~center of anal base; space between dorsals 7-9% TL, 2X 1st dorsal base; distance between pectoral and pelvic bases 9-12% TL; anal fin moderately long, base 13-15% TL, fin fairly high and angular, separated from tail fin by a small notch; tail fin elongate, relatively low and narrow, top lobe with a subterminal notch, lower lobe weakly developed, without crest of denticles along top margin.

Uniform dark brown.

Reaches 46 cm

Trawled from soft bottoms

Depth range 700-1803 m

The Gulf of Mexico to the southern Caribbean.

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  • Marine
  • Marine Only
  • Inshore Only
  • Offshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Bathydemersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Octopus/squid/cuttlefish
Egg Type
  • Benthic
  • Data
  • No pelagic larva
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent
  • Continent + Island (s)
  • GC endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 46
Depth Range Min
  • 700
Depth Range Max
  • 1803