Short answers, pulled from the story.
Enki was the god of water, wisdom, magic, and creation who rose from the subterranean waters of the Abzu to become the architect of civilization in the ancient city of Eridu. He was known to the Akkadians as Ea and served as the master of the craft of creation and the protector of humanity.
Enki first appeared in written records during the third millennium BCE, making him one of the most enduring figures in the Mesopotamian pantheon. His influence spread from these earliest records throughout the history of ancient Mesopotamia.
Enki saved humanity by speaking to a reed wall to warn the hero Ziusudra of the coming disaster and instructing him to build a great boat to save the seeds of all living things. This act of defiance against the oath he had sworn to Enlil established Enki as the savior of the human race.
Enki was often depicted with water streams flowing from his body, accompanied by fish, and his emblems included the goat-fish, the ram-headed staff, and the turtle. The goat-fish was later adopted into Roman art as the constellation Capricorn, while the ram-headed staff was used from the Old Babylonian period until the Achaemenid period.
Enki and his wife Damgalnuna, also known as Damkina, had many children including Marduk, the future king of the gods, Asalluhi, the god of incantations, and Nanshe, the goddess of justice. His son Enbilulu was the god of irrigation and canals, reflecting Enki's own connection to water.