Question: Obviously the film is fictitious but surely the melting of the ice caps would not start the evolution of sea monsters, would it? Also, most smaller species would die off so there would be no food for the monsters to survive.
Question: Where and why did Gregor go? If he was going in search of dry land, why has he not gone earlier? Why did the mariner not try to find him, as he could have been a useful person to have on the boat and was a friend of the females? Why did the smoker's plane not shoot down Gregor?