Image of the Day: Cantankerous Crab

Hermit crabs living in broken shells outperform those inhabiting intact shells in fights because they attack more aggressively, compensating for lower muscle strength with vigor.

May 5, 2017
The Scientist Staff

A hermit crab prods a larger shell, potentially provoking a new opponent.


   (See Alcaraz et al., “Aggressiveness compensates for low muscle strength and metabolic disadvantages in shellfighting: an outcome of the individual’s past,” Behavioral Ecology and Sociobiology, doi: 10.1007/s00265-017-2311-7, 2017.)