• Was once a sun-god, but was replaced by Ra
  
• Lives in the water of the Nun (Celestial Nile or Milky Way) (River Nile, too)
  
• Dragon of darkness, death, chaos, evil (in earlier forms: thunderstorms, lightning, whirlwinds, and iron)
  
• Reviled and scorned
  
• Is attacked and killed by the children of Atum-Ra or Set (depends on the version). Some included Mehen.
  
• Is the equivalent of Satan and is NOT worshipped
• Huge sea-serpent, without limbs, although some passages of the Egyptian Book of the Dead do describe him as having 4 limbs and 30 cubits long
• Apophis is Apep's Greek name
• There is an annual festival called the "Banishing of Apep" where the people put all the world's troubles into an effigy, then destroy it.
• Set was originally a good guy, but once he turned 'bad', his legends became a part of Apep - thus there is some similiarity between descriptions and stories.
• Possible enemy in Horus.

2 other, earlier forms:

• Earliest: Typhon: Crocodile-like, did not have the evil attributes (see separate entry)
  
• Middle: Set / Seth / Sethos: Half-crocodile, half-human that could have many forms, but was always red. The Greeks related the 2 tales.
• Osirus, once considered an evil deity, changed to a more beneficial one and his killer, Set, transformed into an evil deity and fused with Apep.

Every day he fights with Ra, trying to eat the sun and prevent the sunrise. When he succeeds, there is a solar eclipse. “With the approach of night the strength of the Ra, the sun god of Helipolis, diminished. The solar barque entered the realm of night and met the powers of darkness. The chief of these was the serpent Apep who tried to swallow the barque; a nightly struggle ensued, and when the sun reappeared on the eastern horizon the next day prayers of thankfulness were offered that Ra was triumphant and the sun would continue to shine”

A Hymn of Praise to Ra when He Riseth in the Eastern Part of Heaven Thine enemy the Serpent hath been given over to the fire. The serpent-fiend Sabau hath fallen headlong, his forelegs are bound in chains, and his hind legs hath Ra carried away from him. A Hymn of Praise to Ra When He Riseth Upon the Horizon, and When He Setteth In the Land of Life The Sabau-fiend hath fallen to the ground, his fore-legs and his hind-legs have been hacked off him, and the knife hath severed the joints of his back. (Translations courtesy of Egyptian Antiquities Information Page.)

• Aker
• Horus