In Isaiah 27:1, the serpent and Leviathan and the serpent/dragon used in Exodus 7 all appear to be the same animal, or something similar. And in Deuteronomy 32:33, the serpent/dragon is used in parallel with a cobra or asp. It makes me suspect "dragon" might not always the best way to translate the word. What do the experts say?
And even it if is best translated "dragon," what were you thinking the ramifications are? Connections to the dragon in Revelation, perhaps? I think we can safely connect many Old Testament appearances of serpents to that dragon anyway. Or were you thinking there are ramifications in the world of biology?