Female cleaner fish can judge when to cheat without getting caught

Female cleaner fish deceive their male partners when the pair are cleaning a client fish, but only if the male is out of sight, suggesting the females have theory of mind

Female cleaner fish can judge when to cheat without getting caught
Female cleaner fish deceive their male partners when the pair are cleaning a client fish, but only if the male is out of sight, suggesting the females have theory of mind