Joern Hurum, a Norwegian dinosaur expert who led the team, said: 'They look like we imagine Nessie of Loch Ness.' With their huge jaws, they were at the top of the food chain and were killing machines of the sea, he added, saying: 'Their jaws could cut anything else into small pieces.' The animal lived about 160million years ago and became extinct about 65million years ago. The fossil of an ichthyosaur - another extinct marine animal - was also found on the Svalbard islands, north of the Norwegian mainland.