Some small catfish are known to climb waterfalls, like the bumblebee catfish seen in the Paraguay River in Brazil. First ...

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 — ...

Video captured by military police in Brazil captured a new skill exhibited by bumblebee catfish. The video showed the fish swimming up a small waterfall, similar to salmon during spawning season.

A waterfall-climbing fish in Hawaii uses the same muscles to both rise and feed, researchers have discovered. Scientists looked at the Nopoli rock-climbing goby (Sicyopterus stimpsoni), also known in ...