TY - JOUR
KW - Animal research ethics
KW - Animal welfare policy
KW - Invertebrate sentience
KW - Laboratory animals
KW - Precautionary principle
AU - Bob Fischer
AU - Meghan Barrett
AU - Brendan Parent
AU - Alexandra K. Schnell
AU - Jeff Sebo
AB - Ethical oversight for animal research extends to vertebrates in most jurisdictions but excludes the vast majority of invertebrates—a taxonomic boundary that is increasingly difficult to justify given accumulating evidence of sentience in several invertebrate groups. This paper argues that researchers, institutions, and governments should develop voluntary best-practice guidance for invertebrate welfare as a practical and proportionate precautionary response, rather than waiting either for definitive proof of sentience or for formal regulatory solutions. We first review neurobiological and behavioral evidence for sentience in cephalopod mollusks, decapod crustaceans, and insects, concluding that a realistic possibility of sentience exists across all three groups. We then argue that a realistic possibility of sentience—rather than confirmation of sentience—is sufficient to warrant precaution, and show that this standard aligns with existing ethical frameworks in the UK, EU, and US. We further demonstrate that invertebrate use in research is substantial, with estimates ranging from tens of thousands of cephalopods and decapods to billions of insects annually.
BT - Biology Direct
DA - 2026-08-31
DO - 10.1186/s13062-026-00963-5
LA - en
N2 - Ethical oversight for animal research extends to vertebrates in most jurisdictions but excludes the vast majority of invertebrates—a taxonomic boundary that is increasingly difficult to justify given accumulating evidence of sentience in several invertebrate groups. This paper argues that researchers, institutions, and governments should develop voluntary best-practice guidance for invertebrate welfare as a practical and proportionate precautionary response, rather than waiting either for definitive proof of sentience or for formal regulatory solutions. We first review neurobiological and behavioral evidence for sentience in cephalopod mollusks, decapod crustaceans, and insects, concluding that a realistic possibility of sentience exists across all three groups. We then argue that a realistic possibility of sentience—rather than confirmation of sentience—is sufficient to warrant precaution, and show that this standard aligns with existing ethical frameworks in the UK, EU, and US. We further demonstrate that invertebrate use in research is substantial, with estimates ranging from tens of thousands of cephalopods and decapods to billions of insects annually.
PY - 2026
T2 - Biology Direct
TI - Ethical guidance for invertebrate research
UR - https://doi.org/10.1186/s13062-026-00963-5
Y2 - 2026-09-04
SN - 1745-6150
ER -