The Port Jackson Shark, Heterodontus portusjacksoni
… is a common inhabitant of the continental shelf of Southern and Western Australia. It feeds on benthic invertebrates, primarily echinoderms. The teeth of the Port Jackson Shark are unusual. They are not serrated, and the front teeth have a very different shape from those found at the back of the jaws. The anterior teeth are small and pointed, whereas the posterior teeth are broad and flat. The teeth function to hold and break, then crush and grind the shells of molluscs and echinoderms. This shark is considered harmless to people, but can deliver a painful nip when provoked.
More about this species: Encyclopedia of Life
Image by John Turnbull via Flickr