This short film shows the practice of glass eel fishing with push sieves in the “Hauts de France”. The glass eels are fished at low speed with sieves that fish closed to the water surface and then are collected on a grid that allows the glass eels to be sorted from by-catches and plant debris. They are kept in tanks and then released, for some, in areas where the eel is in less densities. Active restoration actions carried out by professional fishermen who work for the survival of the species.