Answer:
A Hanukkah menorah (otherwise known as a hanukkiah and not to be confused with the 7-branched menorah that was in use in the Temple, which had nothing to do with Hanukkah) has nine candles: Eight of these are the Hanukkah candles, and one is the shamash - the "assistant candle" that is used to light the others.
The structure of the hanukkiah reflects this: The shamash is not in line with the others; it is either above the other eight, or off to the side.