Heterodontus galeatus (Gunther, 1870)

Heterodontus galeatus
Heterodontus galeatus
Photographer: 
Ian Shaw
Date: 
Wednesday, 29 August 2012
Location: 
North Rock
Depth: 
7m
Additional Notes: 

Large adult shown here, note absence of harness like pattern which distinguishes this species from the common Port Jackson Shark.

Heterodontus galeatus
Heterodontus galeatus
Photographer: 
Ian Shaw
Date: 
Monday, 28 January 2008
Location: 
N W Solitary Is.
Depth: 
10m
Additional Notes: 

Note prominent bony ridge above each eye, giving this species its common name of Crested Hornshark. These ridges become less prominent as they mature.

Heterodontus galeatus
Heterodontus galeatus
Photographer: 
Ian Shaw
Date: 
Friday, 15 January 2016
Location: 
N W Solitary Island
Depth: 
12m
Additional Notes: 

Egg cases pictured, note entangled tendrils top left side of photo.

Common name: Crested Horn Shark
Distribution:

Common in the Solitary Islands Marine Park. Only known from the east coast of Australia, from northern New South Wales south to Montague Island.

Ecological Notes:

Frequents coastal reefs and islands, occasionally in rocky estuaries, to at least 93 m but often seen in shallow waters. Feeds on benthic invertebrates, primarily sea urchins but also crustaceans and molluscs and small fish.

Additional Notes:

Body light to dark brown with broad blackish bands and with high crests above the eyes. Commonly mistaken for Port Jackson Shark, H. portusjacksoni, which has a much more distinct harness like pattern. Oviparous, with paired unusual corkscrew shaped egg cases laid, sometimes with tendrils up to 2 m long. Young approximately 22 cm at hatching. Mature adult in top photograph about 1.3 m long. Second photograph shows distinct eyebrow crest, third photograph shows egg cases entangled in black coral tree. Grows to 1.5 m. 

References:

Graham J. Edgar. Australian Marine Life, 2nd Edition, 2008. Reed New Holland Publishers. pp.449-50.

FishBase. Froese, R. and D. Pauly. Editors. 2018. World Wide Web electronic publication. https://fishbase.ca/summary/Heterodontus-galeatus.html. Accessed 30/09/2018.