Dutch ‘fish doorbell’ becomes unlikely online hit

The doorbell lets viewers help fish get to their spawning grounds (Visdeurbel via AP)

The Dutch city of Utrecht has installed a “fish doorbell” on a river lock that lets online viewers alert authorities to fish being held up as they make their springtime migration to shallow spawning grounds.

The idea is simple: An underwater camera at Utrecht’s Weerdsluis lock sends live footage to a website.