"I went out by night by the Valley Gate to the Dragon Spring..." Neh. 2:13
"In that day the LORD with his hard and great and strong sword will punish Leviathan the twisting serpent, and he will slay the dragon that is in the sea." Isa. 27:1
"Rejoice not, O Philistia, all of you, that the rod that struck you is broken, for from the serpent's root will come forth an adder, and its fruit will be a flying fiery serpent." Isa. 14:29
"An oracle on the beasts of the Negeb: Through a land of trouble and anguish, from where come the lioness and the lion, the adder and the flying fiery serpent, they carry their riches on the backs of donkeys, and their treasures on the humps of camels, to a people that cannot profit them." Isa. 30:6
"And another sign appeared in heaven: behold a great red dragon..." Rev. 12:3a
"Now war arose in heaven, Michael and his angels fighting against the dragon. And the dragon and his angels fought back, but he was defeated and there was no longer any place for them in heaven. And the great dragon was thrown down, that ancient serpent, who is called the devil and Satan, the deceiver of the whole world- he was thrown down to earth, and his angels were thrown down with him." Rev. 12:7-9
Giants? Witches? Ghosts and Spirits? Dragons? Sea Monsters? Talking Animals? All in the Bible. Perhaps Lewis, Tolkien, and Rowling didn't write so much fantasy after all.