That still leaves the point standing that there were no icebergs, and without icebergs the ice worms are irrelevant, no?
And besides, worms "creepeth", don't they? So they were killed whether they "creepeth" the ground or the ice, no?
Gen 7:21: And all flesh died that moved upon the earth, both of fowl, and of cattle, and of beast, and of every creeping thing that creepeth upon the earth...
Dog is my copilot.