Kundalini Yoga is a general term referring to the practice of breathing and meditation aimed at merging solar and lunar energies within the body, thus balancing their inner male and female energies. The male energy is here represented by the sun and the female by the moon. The sixth Chakra (on image at bottom left between the eyes of the seated figure) represents the unity of male and female energies. The "energy" of this Chakra represents unity and neutrality and an awareness of immortality of spirit. The image at left represents the quest to balance inner male and female energies.
Tantric yoga is an ancient Hindu and Buddhist sect which stresses the union of the male god Shiva and the female god Shakti into cosmic oneness, a reunification of two halves that were separated at the creation of the universe. Tantric practices involve breathing and chanting exercises as well as prolonged sexual intercourse. Tantric symbology includes the seven chakra, or energy centers in the body which symbolize the progression of the coiled serpent kundalini, a symbol for the goddess Shakti rising through all other energy centers to join Shiva at the crown chakra, located at the top of the head.