Pain experience in hermit crabs?

@article{Elwood2009PainEI,
  title={Pain experience in hermit crabs?},
  author={R. Elwood and M. Appel},
  journal={Animal Behaviour},
  year={2009},
  volume={77},
  pages={1243-1246}
}
Pain may be inferred when the responses to a noxious stimulus are not reflexive but are traded off against other motivational requirements, the experience is remembered and the situation is avoided in the future. To investigate whether decapods feel pain we gave hermit crabs, Pagurus bernhardus, small electric shocks within their shells. Only crabs given shocks evacuated their shells indicating the aversive nature of the stimulus, but fewer crabs evacuated from a preferred species of shell… Expand
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