Thetis is a Greek sea goddess who represents fertility. She is a creator goddess, for all life begins in the sea, and she is usually portrayed as a Nereid (sea nymph): a beautiful, young semidivine goddess fond of dancing and singing. She helped raise the artisan god Hephaestus and once provided sanctuary for Dionysus.
Thetis is particularly known as a shape-shifter: when Peleus desired to marry her, she transformed herself into fire, water, a lion, and a serpent in order to escape him. As the personification of calm waters, Thetis is responsible for providing a peaceful sea. She is that center of peace and calm that is always available, even in the midst of changing forms. She is a goddess who enjoys life’s pleasures.