English: Fighting in juvenile American lobsters (Homarus americanus) begins with a series of threat displays. If opponents are evenly matched, the encounter progressively escalates through ritualized components of fighting, restrained forms of physical combat, and finally brief periods of unrestrained fighting where opponents may even inflict injuries on each other (for details see Huber R & EA Kravitz. 1995. A quantitative study of agonistic behavior and dominance in juvenile American lobsters (Homarus americanus). Brain Behav. Evol. 46: 72-83)