Port Jackson Shark Size report

In the large sea world, sharks are not all fierce predators. The eight known species of Heterodontidae family are all relatively small in size, generally 50-150 cm in length. Among them, there is a species with a very unique appearance, living in the southern coast of Australia, their name is Port Jackson shark. They are usually calm and peacegul, their bite can also be painful when they feel threatened.

Port Jackson shark received its name after Port Jackson, Australia, where it is commonly seen. The Port Jackson shark is a migratory shark, but it generally stays in Australian waters, usually moving south in summer and returning north to spawn in winter.

Australian tiger sharks, unlike most sharks, can eat and breathe at the same time, grinding up crustaceans and molluscs with their unique teeth. Feeds mainly on echinoderms, crustaceans, molluscs and some small fish. Sea urchins and large gastropods are most commonly found in the stomachs of Australian tiger sharks. Let's learn more about the special member of the tiger shark family.

Port Jackson Shark Size and Features

Port Jackson sharks is oviparous (egg laying) type of bullhead shark of the family Heterodontidae, they are characterized by large heads with protruding foreheads and taupe bodies with dark brown markings resembling harnesses. You wouldn’t guess looking at them, but Port Jackson sharks are from a line of ancient sharks that are older than some dinosaurs. Their skin is rough and very tough; their body color can be gray, light brown, beige, or white. Their shark mouths are very unique, with small sharp teeth in the front and large molar-like teeth in the back, but no sharp teeth. This shark tooth structure makes them better at preying on hard-shelled animals. The Australian tiger shark, like other tiger sharks in the tiger shark family, feeds on starfish, shells, crabs, shrimps, etc. on the seabed.

Average Size of Port Jackson Shark

The general body length of the adult Port Jackson shark is between 137-168 cm and their body width measures 20-26 cm. The body length of newborn baby sharks is 180-220 mm. The typical weight of the Port Jackson Shark is in the range of 6-16 kg. These medium-sized Australian sharks can live for around 25-30 years.

Quick Facts
Type
Tropical Marine
Born Size180-220 mm
Average Length137-168 cm
Average Weight6-16 kg
Lifespan25-30 years

Living Habits

The Port Jackson shark is a nocturnal deep-dwelling shark found in temperate waters in the southern half of Australia. Males and females may occupy different habitats most of the year; they only meet briefly during breeding. The species is believed to have a vast spatial memory and is aware of changes in other groups and habitats. So if a Port Jackson shark is disturbed at one location, it can quickly find another acceptable habitat within the area.

Depending on the season, Port Jackson sharks migrate between "feeding grounds" and "spawning grounds". During the mating season between August and November, Port Jackson sharks can be seen spawning on shore, so more pups can be seen in the shallows during the hatching period. As we all know that shark eggs are the most unique one in the oviparous marine world. The dark and spiral shape is the most common shape of shark eggs, such as the shark eggs of Australian sharks.

Conclusion

The harness-like markings across the body and eyes and the spine in both dorsal fins are what you can use to know the Port Jackson Shark. Fortunately, the Port Jackson Shark is not the target of human hunting. The fact that Port Jackson sharks reach maturity later in life, along with the limited number of eggs produced each year, and high embryonic mortality rates could all contribute to a decrease in the population. They have already adapted to life in the deep sea. Their special respiratory system and eggs allow them to lie in ambush on the seabed for a long time, which is conducive to hunting or evading predators.


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