A school of tropical clupeid fish exhibit synchronized behaviour to keep a healthy distance from a teenage black-tip reef shark in this behaviour category winning image in the inaugural Royal Society Publishing photography competition. The picture was made by Claudia Pogoreutz at a shallow reef flat on Kuramathi Island in the Rasdhoo Atoll, Republic of Maldives. The award celebrates the power of photography to communicate science. All the winning photos and runners up will be on display at Life through a lens, a free Royal Society in London event on 26 November 2015.