11 March 2019

“Crustacean Compassion” advocacy group gives one-sided view of evidence

This morning I learned of the UK advocacy group “Crustacean Compassion”, which wants to change laws around the handling of crustaceans in the United Kingdom. They are currently engaged in a campaign to recognize the decapod crustaceans as having “sentience.”

They claim to be an “an evidence-based campaign group,” but when I went to their tab on whether crustaceans feel pain, I was presented with a one-sided view. Not lopsided. One-sided.

All the evidence comes from one lab, that of Professor Robert Elwood.
Weirdly, the page is so singularly built from Elwood’s work that it even omits research from other labs that could be viewed as supporting their premise that decapod crustaceans might feel pain.

They present experiments that have not been independently replicated as though they were unquestioned. They discuss none of the interpretive problems behind those experiments. They act as though there is a clear consensus within the scientific community when there is not (review in Diggles 2018).

Their full briefing for politicians is similarly one-sided.

In science, single studies are not definitive. Studies all arising from a single lab are not definitive.

If you claim to be all about the evidence, you have to present all the evidence, not just the evidence that supports your position. Some of the individuals behind the group have academic and scientific backgrounds, but judging from their bios, none have training working with invertebrates. None have training in neurobiology.

While I have reservations about the information provided by their group, the part of me that loves graphic design gives them full points for their clever logo (shown above).


Diggles BK. 2018. Review of some scientific issues related to crustacean welfare. ICES Journal of Marine Science: fsy058. https://doi.org/10.1093/icesjms/fsy058

Puri S, Faulkes Z. 2015. Can crayfish take the heat? Procambarus clarkii show nociceptive behaviour to high temperature stimuli, but not low temperature or chemical stimuli. Biology Open 4(4): 441-448. https://doi.org/10.1242/bio.20149654

Related posts

Crustacean pain is still a complicated issue, despite the headlines

What we know and don’t know about crustacean pain

Switzerland’s lobster laws are not paragons of science-based policy

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