Fish doorbell

So…there’s this thing…in Utrecht. It’s a camera placed at the bottom of the lock gate. It’s a fish migratory route. But fish can’t press a doorbell for someone to let them through. So a website has been set up and I am indeed geeky enough to be glued to the live stream watching for fish who need a hand!
I managed to press the bell in time today! Here’s the picture it submitted. Once there are enough fish, they open the gate and fish can go off to their next stop.

That is all.