In Lord of the Flies, when Golding refers to the beast from the water, does he mean the beast 666 from the Bible?I made some research about the...

Golding definitely employs religious allegory in his novel
Lord of the Flies.  His diction in this novel is so painstakingly
deliberate, leaving nothing to chance.  The titles of the chapters are all full of
meaning and symbolism.  Certainly the title "Beast from the Water" is an allusion to the
Beast in the Book of Revelations; one the major themes of the novel deals with man's
inherent sinful nature.  The beast in the Bible and the beast in Golding's novel both
represent pure evil.  Later, when the Lord of the Flies taunts Simon in the jungle, he
reveals that he is the Beast, "the reason why it's no go? Why things are the way they
are?" (143).  The name 'Lord of the Flies' is yet another Biblical reference to the
devil, translated from the word 'Beelzebub.'  Golding uses these references to the devil
to underscore his theme about man's innate inclination toward sin and
destruction.