Why is there no mention of dinosaurs in the great book?

[LostLocke]

Yeah right, I seriously doubt the plesiosaurs could breathe fire out of their nostrils. Because the Book of Job states that leviathan does to do that. Although the more sane Christians would say that leviathan was a crocodile. But still do you know any crocodiles that breathe out fire, seriously?

Back in my JW days our interpretation (or, at least the interpretation the Watchtower Society gave us) was that Leviathan was just a very large crocodile and the fire breathing was not literal, just a metaphor for the power it had in size and strength.