Tag Archives: damselfish

Fish recognize faces

Damselfish can recognize members of their own species by their unique facial patterns, detectable to us only under ultraviolet light. The fish were tested under conditions where they were rewarded for swimming toward an image of a fish-face they had seen before over a novel image. They overwhelmingly picked familiar faces. Since fish swim in groups, it may benefit them to know their neighbors.

Also, the title of the article should be "Not just a human skill!" - as it is surprisingly not a human skill...

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