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The shark species "Crested bullhead shark"

Photo
Crested bullhead shark
Crested bullhead shark
Photo © BluePlanetArchive.com

Photo © BluePlanetArchive.com

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
Crested bullhead shark

Rough area of distribution

Taxonomy
Kingdom:
Animals (Animalia)
Phylum:
Vertebrates (Chordata)
Class:
Cartilagenous fishes (Chondrichthyes)
Order:
Bullhead sharks (Heterodontiformes)
Family:
Bullhead sharks (Heterodontidae)
Genus:
Heterodontus
Names
Scientific:
Heterodontus galeatus
English:
Crested bullhead shark
German:
Kamm-Stierkopfhai
French:
Requin dormeur a crete
Spanish:
Dormilon carenado
Appearance
Cylindrical trunk with conical head. Small spiracles behind and below the eyes. Very short snout, bluntly rounded. Very high supraorbital ridges. Both dorsal fins with a stout fin spine. Origin of first dorsal fin behind midbase of pectoral fins. Origin of second dorsal fin mid of the pelvic fins" free rear ends. Large pectoral fins. Anal fin present.
Coloration
Dark (blackish) broad bands on head, back and tail. Brownish (light) basic collar.
Distribution
Western South Pacific: Australia (Queensland, New South Wales).
Biology
A common bottom oriented shark over the continental shelf, from close inshore down to about 90 m.
Diet
Feeds primarily on sea urchins, and crustaceans, molluscs and small fishes.
Size
Maximum length about 150 cm, average size between 100 and 120 cm.
Reproduction
Oviparous (egg laying). Egg cases are simply built, with narrow, paired spiral flanges, which are diagonal to egg axis (6 to 7 turns visible on sides). Long and slender tendrils on egg apex. Free laying eggs need about 5 months to hatch. Size at birth about 17 cm. Females reach maturity after about 11 to 12 years.
Similar Species
Other bullhead sharks have a similar appearance but the very high supraorbital ridge is very distinctive.
Vulnerability
Category: Least Concern (LC)
Criteria: -
Last evaluated: 2016
Trend: Unknown




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

Danger to Humans
Harmless.

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