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Groups of spotted catsharks showed marked variations in their personalities and sociability in a study conducted in the U.K. and led by behavioral ecologist Dr. David Jacoby.

The small sharks were studied in a lab setting and put into groups of ten in three different environmental situations. Across all three settings, researchers noticed that certain sharks exhibited more independent behavior while others were more gregarious. The gregarious sharks tended to ally themselves with groups, while the more solitary sharks remained alone and camouflaged themselves among their surroundings.

Scientists believe that these are both survival mechanisms that are exhibited based on the individual personality sharks.

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