From the Amazon to the Himalayas, an invasive catfish makes its Nepal debut

KATHMANDU — The discovery in a Nepali river of an armored catfish native to the Amazon has alarmed researchers and conservationists, who say it’s still not clear how the species found its way from the South American rainforest to the Himalayan nation. Forty-three specimens of Pterygoplichthys disjunctivus...
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