Gadjamina, Gaja minah, or Eon is an elephant-headed mythical creature with the body of a fish. The term is derived from the Sanskrit words gaja "elephant" and mëna "fish". It is used for patulangan sarcophagi in Bali, Indonesia. The form is used for members of the Shudra caste as well as the Kshatriya caste.
Gajahmina is the name of a Balinese constellation (lintang) that corresponds to the Western constellation Cetus.