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logo 9/7/2024 9:31:38 PM     
This 6-foot-long, 200-pound catfish is a goliath—and makes an epic migration 
By Stefan Lovgren US Source: nationalgeographic 3/21/2024
Stefan Lovgren
Credit: Professor Dr. Diego Zacardi and MSc. Fabíola Silva		 When Ronaldo Barthem began studying the dorado, a type of goliath catfish, in an estuary of Brazil’s Amazon River several decades ago, he was puzzled by the absence of adult fish. Where, he wondered, did the golden-hued animal, which can grow up to six feet long, go to spawn?
 

Years of investigation revealed a stunning answer: The dorado swims through several countries, all the way to the foothills of the Andes on the opposite side of the continent, to complete its life cycle. The 7,000-mile roundtrip journey is by far the longest migration made by any freshwater fish in the world, according to recently published research in the journal Fish and Fisheries.

  
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