In a river of northeastern Brazil, an “armored” creature with “large” eyes paused to rest against a rock. The maze-like ...

Armored catfish are driving manatees out of their warm-water refuges, putting their health at risk. Here’s why it’s happening—and what scientists are doing to help. An invasive armored ...

Looking at the catfish, researchers quickly realized they’d discovered a new species: Hypancistrus yudja, or the Yudjá armored catfish. Yudjá armored catfish are considered “small ...

Looking at the fish in a laboratory, researchers quickly realized they’d discovered a new species: Hypancistrus seideli, or Seidel’s armored catfish. Several Hypancistrus seideli, or Seidel ...