To punish or not to punish: Lessons from reef fish and saber-tooth blennies

Researchers have experimentally shown that some species of reef fish will enact punishment on the parasitic saber-tooth blennies that stealthily attack them from behind and take a bite, even though their behaviour offers no immediate gain. The study, published online on November 4 in Current Biology, a Cell Press publication, shows that punishment ultimately serves all members of the reef fish species well...

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