The great hammerhead shark is one of the strangest looking fish in the sea and is also largest of all hammerhead species.This shark can grow to an average length of 3.5m (11ft) but they can grow to be 6 metres long.When night falls on the reef the hammerhead goes into action when a coral reef fish hides in the sand the hammerhead uses it's famous 'hammer'-shaped head is believed to have evolved to allow it to have greater surface area for sensory organs - allowing it to scan larger areas of the sea bed when hunting.The hammerhead has built in sensory equipment that would make the ethical hackers green with envy.Great hammerhead shark can sense just half a billionth of a volt that's like detecting the electricity generated by a flashlight battery from distance of 1600 kilometres ! The hammerhead shark prossesses so many extraordinary senses that it's almost impossible for just to imagine how it perceives the world.