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The original was posted on /r/todayilearned by /u/itsneverpersonal on 2023-06-25 04:40:28+00:00.

Original Title: TIL fish have thoughts and feelings, they like to have fun, and they achieve stress relief through soothing physical contact like monkeys and humans do (think mutual grooming or massage therapy). They grieve if they lose their mate, and fish who can’t get with their desired lover become pessimistic.