Port Jackson sharks usually live in rocky environments on, or near, the bottom.
Sometimes they are found in muddy and sandy areas, or where sea grass occurs. Their diet usually consists of sea urchins, molluscs, crustacean,s and fish. They forage for their food at night when their prey is most active, and often use caves or rocky outcrops as protection during the day.
The Port Jackson shark can grow up to 1.65 metres. Commonly, the males grow to 75cm, and the females between 80cm and 95cm. When they hatch, juvenile Port Jackson sharks, called pups, are about 25cm long.
The family heterodontidae is found in tropical and temperate marine waters in depths down to 275 metres. Although most are found in depths less than 100 metres. The Port Jackson shark occurs in southern Australian waters.
Port Jackson sharks are considered harmless to humans although the teeth, whilst not large or sharp, can give a painful bite.