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The Port Jackson shark is a nocturnal, bottom dwelling ‘bullhead’ shark endemic to the Great Southern Reef. These sharks grow up to 1.65m and can live for more than 30 years. They usually live at depths of less than 100 metres but have been known to go as deep as 275 metres.
The Port Jackson shark’s diet is composed of sea urchins, other invertebrates, and small fishes. Behavior Considering that heterodontid sharks are relatively poor swimmers, some tagged Port Jackson sharks migrate over impressive distances (up to 850 miles) from their breeding grounds in the northern part of their range, to their summer ...
Aug 13, 2020 · A Port Jackson Shark At Wilsons Promontory, Victoria. (Author: Mark Norman / Museum Victoria cc by-3.0) The Port Jackson shark is one of three Australian species belonging to the Heterodontid (bull-head) shark family. It’s actually the largest in body size of the group and is quite unmistakable with its broad forehead ridges, blunt forehead ...
Port Jacksons can pump water through their first gill slit allowing them to remain still on the seafloor for long periods. An unusual feature of the Port Jackson Shark is their spiral shaped eggs. Females can wedge them into cracks and crevices where they are held in place by the corkscrew-like grooves. Listed as least concern by the IUCN.
Port Jackson shark. bullhead shark, (genus Heterodontus ), any shark of the genus Heterodontus, known for its broad head, small mouth, and short snout. The genus contains about 11 species and constitutes the family Heterodontidae (order Heterodontiformes). This exclusively marine group is found only in the tropical reaches of the Pacific and ...
Port Jackson Shark (Heterodontus portusjacksoni) are a member of the Heterodontidae family of bottom dwelling sharks, which is found living in the temperate waters off the southern coast of Australia. While Port Jacksons can tolerate a range of temperatures between 58°F to 79°F, they prefer water temperatures between 60°F - 72°F.
The Port Jackson Shark has two triangular dorsal fins, each with a strong spine, and a small anal fin, and jaws with sharp grasping teeth at the front, and flat grinding molars at the rear. Port Jackson sharks lay dark brown spiral egg cases, and the young hatch after about one year.
