Skip to main content
Netherlands News in English

Main navigation

  • Top stories
  • Health
  • Crime
  • Politics
  • Business
  • Tech
  • Culture
  • Sports
  • Weird
  • 1-1-2
Image
Two European perch swim by the Visdeurbel in Utrecht. 5 April 2021
Two European perch swim by the Visdeurbel in Utrecht. 5 April 2021 - Credit: Visdeurbel / https://visdeurbel.nl/
Tech
Nature
Utrecht
fish doorbell
fish
marine life
Wednesday, 14 April 2021 - 18:04

Share this article:

Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window

World's first fish doorbell pressed 32,000 times in first two weeks

Since the world’s first fish doorbell was unveiled in Utrecht slightly over two weeks ago, the bell has already been rung over 32 thousand times.

People from all across the world are able to monitor marine life in the city's central Oudegracht canal via an underwater camera. Should a viewer take notice of a passing fish, they can ‘ring’ an online bell at which point a lock keeper receives a notification. When the lock keeper notices a number of fish have aggregated in the same spot, he or she can open the port to let the fish swim through.

The municipality is happy the fish doorbell has attracted attention globally. “It is beyond our expectations. We want to show people that the Oudegracht is more than a body of water where boats sail through”, a spokesperson said to RTV Utrecht.

Fish typically migrate from the Oudgracht to the Kromme Rijn in spring to lay eggs. During this time of year, there are usually few boats which means that the locks do not open to let fish pass.

Urban ecologist, Anne Nijs, was astounded at the amount of activity taking place below the surface of the water. “Perch, pike, a bindweed, maybe an eel. I did not know that are so many fish swimming through Utrecht. This is an eye-opener for me”, the urban ecologist said.

Nijs said she wishes to further examine which other species call the waters of Utrecht their home. She recommended watching the fish doorbell in the late afternoon/early evening hours when the fish are most active.

The camera will remain active until the end of May when the fish have finished their migration for the most part.

More like this

Image
A fish "ringing" Utrecht's fish doorbell on 27 June 2025
Utrecht's fish doorbell open; Thousands keep eye out for fish needing lock opened
Image
A school of European Perch swim past a Fish Doorbell camera in the Weerdsluis in Utrecht. 7 June 2023
Utrecht’s fish doorbell returns March 2 to help migrating fish
Image
A school of European Perch swim past a Fish Doorbell camera in the Weerdsluis in Utrecht. 7 June 2023
Millions tune in as Utrecht’s fish doorbell goes live for fifth year
Image
A school of fish waiting for someone to ring the fish doorbell in Utrecht. March to June, 2023
Fish doorbell season begins again letting people help migrating fish in Utrecht
Make NL Times your top Google source

Follow us:

Latest stories

  • Police confirm persistent stink at Amsterdam prison
  • Renewed conflict between U.S., Iran will cause more hunger, refugees: Dutch FM
  • The Hague marks 31 years since Srebrenica genocide under Dutch peacekeepers’ watch
  • Officials warn of domestic violence and child abuse surge across Noord-Brabant
  • Aid groups halt services at asylum center after incidents linked to small group of men

Top stories

  • Netherlands braces for incoming heat wave as temperatures to reach 34°C
  • Dutch workplaces not ready for rising heat, labor union warns
  • Dutch spy agencies: Russia hacked cameras to spy on military routes
  • Romanian boy who met Dutch girl on Roblox guilty of forcing her to cut herself, kill pet
  • Dutch live event venues struggling; Half ended 2025 in the red, 14% drop in clubbers

© 2012-2026, NL Times, All rights reserved.

Footer menu

  • Change Privacy Settings
  • Privacy Policy
  • Contact
  • Partner Content