French fishermen 'talk' to dolphins to save them

For the first time ever, fishermen in the Bay of Biscay are testing new high tech fishing gear that “speak dolphin language” to warn them of danger. The aim : reduce bycatch, after tens of thousands of dolphins drowned in fishing nets in recent years. Could ultrasound beacons save marine life and support the fishing industry ? FRANCE 24’s Aurore Cloé Dupuis and Alexandra Renard explain.