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Scientists drop recorders into Amazon stream - and catch predators hunting like orcas

Electric eels 'switch off' their electronic pulses to sneak up on prey – a hunting strategy similar to that of orcas using (and not using) echolocation. After sunset in the Amazon rainforest, a war of stealth begins in the rivers and streams. Electric eels ‘see’ the world through electronic pulses. They send out electricity and, through specialist sensory organs, detect distortions in their electric ... [3116 chars]

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