Long-time Slashdot reader [1]invisik reminds us that the "fish doorbell" is still going strong, [2]according to the Associated Press . "Now in its fifth year, the site has attracted millions of viewers from around the world with its quirky mix of slow TV and ecological activism."

> The central Dutch city of Utrecht installed a " [3]fish doorbell " on a river lock that lets viewers of an online livestream 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. When somebody watching the site sees a fish, they can click a button that sends a screenshot to organizers. When they see enough fish, they alert a water worker who opens the lock to let the fish swim through.

"Much of the time, the screen is just a murky green with occasional bubbles, but sometimes a fish swims past. As the water warms up, more fish show up..."



[1] https://www.slashdot.org/~invisik

[2] https://apnews.com/article/fish-doorbell-netherlands-internet-streaming-f09da0435a61e88a1d7b0372920bb7da

[3] https://visdeurbel.nl/en/