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Scientists have found the reason why fishes try to fight the sight of their reflection.

A study was conducted by showing a male African cichlids their reflection or another fish behind a pane of glass. Scientists have found that in both cases the fish tried to fight.

They are terrified when their reflections made exactly the same move as they did. The study also shows how similar their brains are to ours.

“I think this indicates there is more going on cognitively than people have long assumed in fish,” said biologist Dr Julie Desjardins, who led the study.

The fishes’ brains showed high activity in the amygdala, the region linked to fear in all vertebrates including humans. Dr Desjardins said the fear was due to the unfamiliarity of the encounter.

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