Drawing on over 300 scientific studies, we have evaluated the evidence of sentience in two groups of invertebrate animals: the cephalopod molluscs or, for short, cephalopods (including octopods, squid ...

Mollusks are the second largest animal phylum in the world, behind only Arthropods (a group that includes insects, spiders and crustaceans). Scientists suggest the Earth might host up to 200,000 ...