God and defender of the Sun Boat, have the appearance of a serpent-headed man holding a spear, standing in the prow of the Sun Boat, or as a giant snake coiled around it.
In the Old Kingdom and in predynastic literature, Mehen, along with Set in his original form, fights Apep daily as the sun travels across the sky. Mehen wraps his coils around Apep, while Set strikes at Apep with a spear.