<ul><li>In Utrecht, Netherlands, fish are swimming upstream to their spawning grounds but are prevented from reaching their destinations due to a boat lock.</li><li>To assist the fish, a live stream camera has been set up at the boat lock. Viewers can ring the doorbell when they spot a fish, which alerts the lock operator to open the lock and allow the fish to swim through.</li><li>The quicker the fish are able to pass through the lock, the higher their chances of survival as they are vulnerable to predators while waiting.</li><li>By participating in the fish doorbell project, viewers can contribute to improving water quality and freshwater marine life in the canals of Utrecht.</li></ul>

The famous fish doorbell season is back! How to help

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