A mantis shrimp in a defensive position, on its back with its legs, head and heavily-armoured tail closed over. The red colour indicates areas of reflected circular polarising light. Credit Yakir Gagnon/QBI

The ocean is lighting up with secret forms of communication between marine animals that may have applications in satellite remote sensing, biomedical imaging, cancer detection and computer data storage, a team of Australian and international...

20 November 2015