Michel Roggo is a specialist in underwater photography in Switzerland's rivers and lakes. Taking these pictures sometimes requires patience: it can take anything up to three days before a fish cares to swim in front of the camera lens.
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You can find an overview of ongoing debates with our journalists here. Please join us!
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.