Human-like sense of social punishment: In 2010, fish shocked scientists by punishing bad behavior at feeding time

Good manners may not be something you expect to find beneath the ocean, but one species of fish appears to enforce them surprisingly well. A 2010 study found that male cleaner fish punish females when they break the rules during feeding, revealing behavior that closely resembles a form of human social punishment, as per a report by Live Science.

Human-like sense of social punishment