The influence of attraction flow on upstream passage of European eel (Anguilla anguilla) at intertidal barriers

► Plunging and streaming attraction flow tested at eel ladders on intertidal barrier. ► Eel passage 2 fold higher in the presence of plunging flow. ► Strong 'edge effect' in eel route choice with greatest catches near banks. ► Largest eels exclusively passed towards the centre of the channel. ► Addition of simple design feature enhances eel passage at barriers.