Thanks to a certain Mr Spielberg a number of people think that sharks are restricted, species wise, to a great white man eating variety. However, as points out here, there is more to the whole genus than necessarily meets the eye at first glance. They come in all shapes and sizes - and they don't always eat us either!
From the article:
The small but scary-looking Tropical Sawshark that is native to Australia is a recently described species of sawshark. It can be found at a depth of 246-405 meters (810-1,330 ft). Its specific epithet delicatus is Latin for "delicate", referring to the fine teeth on its saw-like rostrum.