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Maroc Maroc - WN.COM - Science - Hier 12:01

Thousands of small fish defy gravity to climb Congo waterfall

A species of small fish has been observed by the thousands climbing a vertical waterfall 15 metres (50 feet) tall in the Democratic Republic of Congo in a behaviour ​that illustrates the surprising and ingenious ways animals can adapt to extreme environments. The researchers documented how this species of shellear fish, whose scientific ‌name is Parakneria thysi, scales the Luvilombo Falls in the upper Congo Basin, a vast river system spanning Central Africa and home to the world’s second-largest rainforest. Researchers observed the fish ascending the vertical rock face during seasonal floods at the end of the rainy season, typically...

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