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

LUIS MIGUEL BURCIAGA

(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.)

Interested in reading more?

The Scientist ARCHIVES

Become a Member of

Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!