The document summarizes research into the chemotaxis and foraging behaviors of Octopus rubescens. It discusses how octopuses may use chemotaxis when vision is limited, citing previous studies that found octopuses can detect chemicals. The study described in the document tested whether O. rubescens could choose between a live crab or an empty area using either vision or smell. The results provided limited evidence for distance chemotaxis but suggested octopuses may respond more to stressed prey. Further analysis of proteins and genes in stressed versus unstressed crabs was conducted to explore what chemical signals octopuses could be detecting.