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The shark species "Daggernose shark"

Photo
Unfortunately, there is not yet a photo of this shark in the database
Unfortunately, there is not yet a photo of this shark in the database
Range Map
North America South America Africa Australia Europe Asia Coming soon Coming soon
North America South America Africa Australia Europe Asia Coming soon Coming soon
Daggernose shark

Rough area of distribution

Taxonomy
Kingdom:
Animals (Animalia)
Phylum:
Vertebrates (Chordata)
Class:
Cartilagenous fishes (Chondrichthyes)
Order:
Ground sharks (Carcharhiniformes)
Family:
Requiem sharks (Carcharhinidae)
Genus:
Isogomphodon
Names
Scientific:
Isogomphodon oxyrhynchus
English:
Daggernose shark
German:
Dolchnasenhai
French:
Requin becune
Spanish:
Cazon picudo
Appearance
General features of a typical requiem shark but with an extremely long, flattened and pointed snout. Very small eyes (circular). No spiraculi. First dorsal fin erect. Origin of first dorsal fin over midbase of pectorals. Second dorsal fin comparably large, about half the height of first dorsal fin. Origin over or slightly anterior to the anal fin"s origin. Very large paddle-like pectoral fins. No interdorsal ridge present.
Coloration
Grey to brownish upper body, white ventral surface. No conspicuous colour patterns.
Distribution
Western Atlantic: Trinidad, Guayana, Surinam, French Guinea.
Biology
A little known species. Supposedly frequently seen in estuaries and river mouths, and over rocky bottoms.
Diet
Small schooling fishes. The long snout and small eyes are possibly adapted for getting prey in murky water, though not yet proven.
Size
Maximum size may be as much as 244 cm, although not confirmed yet. Largest measured species was 152 cm.
Reproduction
Viviparous, with yolksac placenta (gives birth to live young). 4 pups per litter. Size at birth between 38 to 41 cm. Males reach sexual maturity with about 95 cm, females with about 110 cm.
Similar Species
No other species possesses the combination of this very long snout and the paddle-like pectoral fins.
Vulnerability
Category: Critically Endangered (CR)
Criteria: A2bcd
Last evaluated: 2020
Trend: Decreasing




© IUCN Red List 2024. The IUCN Red List of Threatened Species: Version 2024-2.

Danger to Humans
Harmless.

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