Commentaries:
Are we reading here of something that could come awfully close to a fire-breathing dragon? Could this be a description possibly of Tyrannosaurus Rex? Is God describing something that Job was familiar with? Yes, He was describing something that Job was familiar with—whatever it is. If Job was not familiar with it, it would have made absolutely no sense to him.
This beast—the real king of beasts—does not fear anybody. We are looking at a description, probably figurative, of Satan the Devil in the form of a dragon, a Tyrannosaurus Rex-like symbol of Satan. The dragon is the real source of power for the Beast—a king of pride, a powerful beast beyond human control, ferocious, dangerous, repulsive, unmitigated power—the quintessential carnivore, seeking to devour.
No wonder Revelation 13:4 says, "Who can make war against the beast?" It gives every appearance of invincibility. A nasty fellow, if ever one was described. It is this beast that places its mark upon human beings. What is "the mark of the beast" in a spiritual sense? What kind of spirit emanates from this wild, ferocious, voracious system being described?
John W. Ritenbaugh
The Spiritual Mark of the Beast