The report, by experts from the London School of Economics, looked at 300 scientific studies to evaluate evidence of susceptibility, and concluded that cephalopods (such as octopus, squid and cuttlefish) and decapods (such as crabs, lobsters and crayfish) should be considered in sentient beings.
Animals with vertebrate, backbones are already classified as vulnerable in new animal welfare legislation under debate in the United Kingdom.
Learning more about Cephalopods and Decapods
The report used eight different methods to measure emotion, including learning ability, the authority of pain receptors, the relationship between pain receptors and certain brain regions, and response to anesthetics. or analgesics, and behavior involving balancing against opportunity for reward and protection from injury or danger.
It found “very strong” evidence of sentience in octopods and “strong” evidence in most Crabs. For other animals in these two groups, such as squid, cuttlefish and lobster, they found the evidence was substantial but not strong.
However, the report states Varying degrees of evidence reflect disparities in the amount of attention different animals receive from scientists.
“Scientific attention for reasons of practical convenience (e.g. which animals can be well kept in laboratories) and geography (e.g. what species are available where a laboratory is located) will focus on some (animals) rather than others. Because of this situation, we think it would be inappropriate to limit protection to specific orders of cephalopods, or specific infraorders of decapods,” the report said.
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