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Species: Rhizoprionodon porosus, Caribbean Sharpnose Shark

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usually no white spots
D1: origin over inner pectoral margin
D2 origin over rear 1/2 A base
teeth strongly oblique, rear notch, smooth/finely serrated
pectoral reaches center D1 base
long ridges before A base

Rhizoprionodon porosus (Poey, 1861)

Caribbean Sharpnose Shark

Body elongate and slender; eyes large, nictitating lower eyelids present; snout long, depressed; labial folds well developed, upper ones about equal to eye diameter, ending well behind eye; teeth on both jaws with narrowly triangular, strongly oblique smooth to finely serrated tips; no spiracles; five gill slits, last two over pectoral; first dorsal fin moderate in height, origin just in front of pectoral fin rear edge, center of its base slightly nearer rear axil of pectoral than origin of pelvic fin; second dorsal low; origin over or slightly behind midpoint of anal fin; rudimentary ridge between dorsals; anal fin rear margin slightly concave; pectoral fins reaching under middle of dorsal fin base when pressed against body, tip pointed, rear margin slightly concave; low ridge between dorsal fins present or absent; long ridge on each side before anal fin; no keel on tail base, but notches above and below.

Brown or greyish brown above, whitish below, usually no white spots on sides; rear margin of pectoral fins white, rear margin of dorsal and tail fins blackish.

Size: 110 cm.

Habitat: A coastal, tropical species, common in bays and estuaries.

Depth: 0-500 m.

The Bahamas to Uruguay.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Mid Water
  • Near Bottom
  • Near Surface
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Water column
  • Estuary
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Octopus/squid/cuttlefish
Egg Type
  • Data
  • Live birth
  • No pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • 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
  • Least concern
  • Listed
  • Not listed
Length Max
  • 110
Depth Range Min
  • 0
Depth Range Max
  • 500