Researchers wanted to study lobsters eating sea urchins. But sharks ate their lunch — video

An experiment designed to investigate the role lobsters play in regulating sea urchin numbers unexpectedly found sharks were eating them instead. The research, led by the University of Newcastle marine ecologist Jeremy Day, involved 50 long-spined and 50 short-spined sea urchins tethered to the entrance of a lobster den on the south coast of NSW. Over the course of 25 nights, sharks ate 45 of the urchins, while lobsters ate only four. Sea urchins are native to NSW but have become are a pest in Tasmania, where they are threatening local ecosystems