Dragon. Dragons are imaginary beasts with a long history in the folklore of many cultures. Usually the dragon is a crafty creature that represents evil. The word dragon, as used in some translations of the Bible, is often confusing. Occasionally this word is used when the intended meaning was probably jackal (Lam. 4:3), (RSV), sea serpent or serpent (Ps. 91:13), (RSV), or even crocodile (Ezek. 29:3-4).

This huge, fire-breathing monster with terrifying wings and claws is a symbol of Satan (Rev. 12:3-17; 16:13; 20:2). In the church of early Christian history, dragons represented sin. Christian art often depicts a dragon at the feet of Jesus– to show His triumph over sin.

Source: [Anon-Animals]