In a river near a police department in southern Brazil, thousands of catfish amassed at the base of a waterfall and began to climb. The unusual fish gathering caught the attention of police officers — ...

Imagine standing next to a loud waterfall in Brazil’s Aquidauana River and seeing thousands of tiny fish climbing straight up wet rocks. These are bumblebee catfish, not just regular river fish ...

By Gustavo Faleiros The background was right for the announcement of the bad news. Fish swam in a wall-sized tank that framed ...

Scientists in Brazil filmed thousands of catfish climbing up waterfalls in a first-of-its-kind sighting, videos show and a study said. Photo from Marinho, de Paula, Severo-Neto, Santos and ...