Hermit crabs Current Biology Mark Briffa, Sophie L. Mowles  Current Biology  Volume 18, Issue 4, Pages R144-R146 (February 2008) DOI: 10.1016/j.cub.2007.12.003 Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 1 A shell fight in Pagurus bernhardus. The attacker holds the defender's shell so that the two shell apertures are opposed and insets its chelae into the defender's shell. In this position, the attacker performs bouts of shell rapping, while the defender is tightly withdrawn inside the shell. Current Biology 2008 18, R144-R146DOI: (10.1016/j.cub.2007.12.003) Copyright © 2008 Elsevier Ltd Terms and Conditions