‘Spongers’ obtain and wear basket sponges — filter feeding invertebrates — on their beaks while scouring the seafloor for prey. According to the researchers, female spongers associate more with each other than with non-sponge users. The results were surprising to the researchers, as Mann suggests that the sponge-wielding dolphins are solitary for most part of their lives. “At first it seemed like the spongers weren’t interested in a social life,” she says. culture?”