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Species: Isogomphodon oxyrhynchus, Daggernose Shark

All Families:   All Genera:   All Species:

snout v long, flat, triangular
eyes v small
pectoral v large, broad



Isogomphodon oxyrhynchus (Müller & Henle, 1839)

Daggernose Shark

Body moderately stout; eyes very small; nictitating eyelid present; snout very long, flat, narrowly triangular when viewed from above, sharply pointed; labial folds short, well developed; teeth numerous small, spike-like on both jaws, upper teeth serrated; no spiracles; gill slits moderate, 5, none over pectoral fin; first dorsal fin moderately high, over pectoral fin base; second dorsal ~ ½ height of first dorsal, origin slightly in front of anal fin base; anal fin with deeply notched posterior margin; pectoral fin very large, broad; no ridge on back between dorsal fins; tail fin strongly asymmetrical, lower lobe of tail well developed, upper lobe with undulating ridge along its top edge, and a notch under its tip, pits at its base; no keel on tail base.

Yellow-grey above, white below; fins unmarked.

Size: 160 cm, possibly 244 cm.

Habitat: Common inshore species in tropics in turbid water around mangroves and river mouths.

Depth: 4 - 40 m.

Trinidad to Brazil.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom + water column
  • Near Bottom
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Water column
  • Beach
  • Estuary
  • Mangrove
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
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 only
  • Extends South of GC
  • GC non-endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Critically endangered
  • Listed
  • Not listed
Length Max
  • 160
Depth Range Min
  • 4
Depth Range Max
  • 40