I was born and grew up in sight of this lock where the fish doorbell is, 61 years ago. I never knew we had this many fish swimming by until this camera perplex

I was born and grew up in sight of this lock where the fish doorbell is, 61 years ago. I never knew we had this many fish swimming by until this camera perplexed me. My boat was moored 30 meters away. My ISP offices where a little further upstream. 2000 Years ago the city of Utrecht grew around this river branch, now called the Kromme Rijn/Vecht but originally it was the main river Rhine. It started out as a Roman frontier fort at the river crossing. https://en.wikipedia.org/wiki/Kromme_Rijn https://en.wikipedia.org/wiki/Kromme_Rijn The Oude Gracht is the second most famous canal monument in the Netherlands after the Amsterdam canal system.