Zodiac signs are classified as earth, water, fire or air; Cancer is this type
The order of the astrological signs is Aries, Taurus, Gemini, 
Cancer, Leo, .... a fifth-century BC Greek philosopher, identified Fire, Earth, Air, 
and Water as ... personality types (sanguine = air; choleric = fire; melancholic = 
water;... [DOC] [TLE] Astrology: Fire, Earth, Air and Water - Trans4mind [PAR] For example, Aries, Leo and Sagittarius are a group of three fire signs.