Dear enemy phenomenon in fiddler crabs: escalation of fights with unfamiliar individuals rather than familiar neighbours

Key Points

• Fight escalation occurs more frequently with unfamiliar individuals compared to familiar neighbors.
• The study shows that unfamiliar interactions can increase aggression by 30% under controlled conditions.
• Observational analysis of fiddler crab behavior highlights contrasting aggression patterns towards known and unknown rivals.
• Understanding these dynamics could inform broader ecological insights about animal behavior and territoriality.