Cuttlefish Seem to ‘Wave’ at Each Other, but What They’re Saying Is a Mystery

Cuteness aside, researchers have uncovered a fascinating new behavior in cuttlefish—waving with their tentacles—to signal dominance or courtship, suggesting a deeper level of intelligence. This wave-making ability could help scientists better understand their complex social behaviors and decision-making processes using machine learning techniques. Previously thought to be exclusive to mammals and birds, this discovery adds new insights into the cognitive abilities of these intelligent cephalopods.