Light emitted by a new species of lanternshark, Etmopterus lailae, is camouflage and helps them to hunt, communicate and find partners. But how does it work? Earlier this year a new species of deep water shark, Etmopterus lailae, was discovered in waters surrounding the Northwestern Hawaiian Islands in the Pacific Ocean. Measurements of external features, teeth, vertebrae and intestines, along with specific external markings and patterns confirmed that it was indeed a new species – a member of the lanternshark family. Lanternsharks (Etmopteridae) are one of the most species-rich shark genera, with approximately 38 known species, 11 of which have...