Female dolphins use sponges more than males

clipped from blogfishx.blogspot.com If you see a dolphin using a sponge, it's probably female. (The dolphin, not the sponge.) Is this any different than people? How many human households have males as the major sponge users? Researchers think the sponges are used for finding food, but here's a more obvious idea. Or, it could be something even more interesting...