Although similar in composition to the large icy moons, the small satellites of Saturn are much more irregular in shape. Hyperion, shown here in a photo taken by Voyager 2, is a highly cratered body of dirty ice.
NASA Press Release #P23936.
Several of the smaller satellites have unique orbits, ranging from the backwards, or retrograde, orbit of Phoebe to the tiny moons that actually share the same orbit. Discovered in 1966, these two co-orbital satellites pass each other every four years, but never collide because of gravitational interactions.