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The Port Jackson shark (Heterodontus portusjacksoni) is a nocturnal, oviparous (egg laying) type of bullhead shark of the family Heterodontidae, found in the coastal region of southern Australia, including the waters off Port Jackson.
Port Jackson Sharks are oviparous, which means that the female lays eggs. The egg case is a tough, dark brown spiral about 7 cm to 8 cm wide and 15 cm long. It is common to see them washed up on beaches.
Mar 10, 2023 · These uniquely adapted eggs come from the remarkable Port Jackson sharks. Subscribe to the DOKBOX YouTube Channel: / @dokbox2986 Find us on socials: Facebook: / dokboxtv Twitter: / dokboxtv...
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Aug 2, 2018 · Learn about the diverse colours and shapes of shark eggs, including the Port Jackson shark egg that looks like a cone with tendrils. Find out how sharks reproduce, what threats they face, and why some eggs are called 'mermaid purses'.
- Angela Heathcote
Learn about the Port Jackson shark, a nocturnal, oviparous bullhead shark found in southern Australia. Discover its appearance, distribution, diet, mating habits, and threats to its eggs.
Like other heterodontids, the Port Jackson shark lays auger shaped egg cases. PJS’s deposit their egg cases in very shallow water, often less than 5m deep. They have been documented holding their egg cases in their mouths and rotating their bodies to literally screw the eggs into cracks in the reef.
Aug 13, 2020 · Egg Case Of A Port Jackson Shark ©Australian Museum. This shark species is oviparous and produces its offspring by laying eggs. They breed once a year starting from August to mid-November. Females will lay their fertilized eggs every 10 – 14 days and the eggs are quite large, almost the size of the mother’s head!
