A tiny fish has shown signs of a remarkable level of intelligence in mirror test experiments, not only recognizing itself in the reflection but also using a piece of food to explore how the mirror ...

CHICAGO — There may come a day on the Illinois River when a fish swims up a chute, slides through a scanner, and, after being recognized as a feared silver carp, is sorted and removed, eventually ...

Some fish can recognize their own faces in photos and mirrors, an ability usually attributed to humans and other animals considered particularly brainy, such as chimpanzees, scientists report. Finding ...