Certain fish are capable of recognizing themselves in photos.
A new study has found that blue streak cleaner fish are capable of recognizing their own reflection in photos.
Researchers from Osaka Metropolitan University in Japan and the University of Neuchâtel in Switzerland published aThe scientists presented the fish with four different photos: A photo of themselves, a photo of another fish, a photo of their head composited onto the body of another fish, and a photo of their body with a different’s fish’s head composited on.
They also displayed “limited aggression” toward the composite photos. In fact, the scientists noted that they were less aggressive toward the composite photos that featured their own heads while acting more fierce toward the composites with their own bodies. “We speculated that if cleaner fish recognize the self-photograph as the self, marked self-photographs would also elicit throat-scraping behavior,” the scientist writes.
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