The Port Jackson Shark or Heterodontus portusjacksoni is easily confused with its close relative the Horn Shark. In fact, Port Jackson Sharks are something even known as Horn Sharks, and sometimes Bullheads. This type of shark was first discovered in Australia in shallow coastal areas. They have a green coloration with dark markings that cover their bodies in unusual patterns. As you can see in the picture below, they have very strange mouths as well!
Port Jackson Sharks can be kept in an aquarium by an expert, but watch out, they have a spine in the front of both dorsal fins that is very sharp and can easily cause injury. An aquarium of at least 1000 gallons is recommended, because these sharks can grow to about 5' in maximum length. The following water conditions in this massive tank are acceptable, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025 and 57-70° F. Although the Port Jackson Shark is hard to keep in an aquarium, once establish they will prove to be quite hardy. In the wild this shark will often feed at night and will eat unsuspecting sleepy fish! In an aquarium you should feed them feeder shrimp, scallops and pieces of marine fish. 
One more thing to note about the Port Jackson Shark is that you will have to have an aquarium with sand substrate on the bottom, because this fish can easily be damaged by sharper options. This can lead to infection which is never good. You can check out the Port Jackson Shark in action in the video below...If you have any additional information about the Port Jackson Shark that you would like to share including where to buy this shark please let us know.
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