This is a news story, published by ScienceDaily, that relates primarily to Katinka news.
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individual human diversScienceDaily
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Science
79% Informative
Fish used visual differences between divers to recognize the person who rewarded them.
Team conducted a series of experiments while wearing a range of diving gear.
They found that fish in the wild can discriminate among humans based on external visual cues.
Little scientific evidence exists to show that fish can recognize humans at all.
Fish associated differences in dive gear, most likely the colors, with each diver.
Fish were conscious of both divers, testing each one and learning that Katinka produced the reward at the end of the swim.
Fish might have learned to pay attention to subtler human features, like hair or hands.
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