Jupiter has a dozen moons other than the large Galilean satellites. These are much smaller than the Galilean moons. An example is Amalthea, shown in the image to the right, which orbits inside the orbit of Io (its color may be due to particles from the volcanoes on Io).

Many of these moons may be asteroids captured in the immense gravitational field of Jupiter. Images of these satellites may be found at the Planetary Picture List.

Information supplied by: http://csep10.phys.utk.edu