According to Hesiod, with Eurybia, daughter of Gaia ("Earth") and Pontus ("Sea"), he fathered Astraios, Pallas, and Perses.
[4] The joining of Astraios with Eos, the Dawn, brought forth Eosphoros, Hesperus, Astraea, the other stars, and the winds.
Joined to fill out lists of Titans to form a total matching the Twelve Olympians, Crius was inexorably involved in the ten-year-long[5] war between the Olympian gods and Titans, the Titanomachy, though without any specific part to play.
When the war was lost, Crius was banished along with the others to the lower level of Hades called Tartarus.
M. L. West has suggested how Hesiod filled out the complement of Titans from the core group—adding three figures from the archaic tradition of Delphi, Coeus, and Phoebe, whose name Apollo assumed with the oracle, and Themis.