Cancer - The Sign of the Crab Ruling planet of this Cancer sign is Moon. Such people are easily hurt on seeing someone suffering. This is a very complex type zodiac sign. They are at times appear extremely strong and at other moments they could be as vulnerable as a child. The Cancer born people are remarkably good at accumulating things. They tend to have a inclination on not to throw anything out and try to keep things for a longer period even if they do not use it.