Do dolphins have culture?
A pair of scientists say new findings that document male Amazon river dolphins carrying objects such as weeds or sticks in a bid to lure female mates is evidence of behavior once believed to be exclusive to primates.
While definitions of culture among animals vary, scientists generally label culture as behavior spread through social learning rather than by genes or ecology. Object-carrying by dolphins suggests a form of sexual display normally found only in humans and chimps, says Tony Martin, one of the scientists who studied river dolphins in the Brazilian Amazon.
Well, what did you expect? Either it's common ancestry or a common Designer.