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 — ...

A group of bumblebee catfish was caught on video appearing to defy gravity, swimming up a mini waterfall in Brazil. In the video, the fish are seen climbing a waterfall in the Aquidauana River, ...

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 ...