Animal world
Discovered that the Amazon fish have scales that can resist Piranha's predatory teeth
The scales structure of a giant fish that can resist the sharp teeth of Piranha predatory fish is known as the 'sea monster' of the Amazon.
Pirarucu
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Animal world
Giant monster in the Amazon River before extinction
Scientists warn the Arapaima, a fish up to 3m long and weighing 180kg, about to disappear completely in the Amazon basin.