According to an ancient Greek legend, the figure of a crab was placed in the nightime sky by the goddess Hera to form the constellation Cancer. Hera swore to kill Heracles, the most famous Greek hero. Hera attempted to kill Heracles in many different ways, but each time his incredible physical strength allowed him to survive. Hera cast a spell of madness on Heracles, causing him to commit a great crime. In order to be forgiven, he had to perform twelve difficult tasks. One of these tasks was destroying the terrible nine-headed water-serpent, Hydra.
During the battle between Heracles and Hydra, the goddess Hera sent a crab to aid the serpent. But Heracles, being so strong, killed the crab by smashing its shell with his foot. As a reward for its service, Hera placed the crab's image in the night sky. (From Wikipedia)
Zodiac: Cancer Known as: The Crab Native American Animal: Woodpecker Associated with: Emotion, Mystery and Intuition Zodiac Quality: Cardinal Element: Water Planet: Moon Gender: Feminine Nature: Negative (Introvert) / Yin Season: Summer Tarot: Moon, Priestess & Chariot Flowers: Larkspur & Acanthus Gemstones: Pearls, Moonstone & Peridot Metal: Silver Animals: Shelled Animals Number: 2 or 3 & 7