According to this research, when octopus and fish hunt together, sometimes the octopus will use its fists. See the twitter video in the article.
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Octopuses Observed Punching Fish, Perhaps Out of Spite, Scientists Say
In new proof that 2020 has been a crappy year basically everywhere, scientists have captured video evidence of octopuses randomly punching at fish, possibly for no reason other than being spiteful.
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