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

Male cleaner fish punish females for eating preferred food. This behavior occurs even when males are not directly harmed. Researchers recreated this dilemma in laboratory experiments. The males act in their own self-interest to ensure meals. This study suggests a form of third-party punishment in fish.

Raccontata daeconomictimes.indiatimes.com