A 'fish doorbell' has turned into an unlikely online hit

In Utrecht, Netherlands, a “fish doorbell” has been installed at a river lock to allow viewers of an online livestream to alert authorities to fish in need during their spring migration. The underwater camera sends live footage to a website, where viewers can click a button to send screenshots. Organizers then open the lock to help fish like bream, pike, and bass reach their spawning grounds, attracting millions of viewers worldwide with this unique blend of slow TV and ecological activism.

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