Infiniti and Ugulu[sblock]Fire would not work underwater, either. I am not sure why you think that fire would work underwater, unless Gansk allowed it. Did Gansk allow a creature to use a fire breath weapon underwater?
I see your point, Infiniti, about the as yet unnamed dragon being above water. The dragon will be able to breathe acid into the water.
The dragon can use breath weapon in round 626.[/sblock]I have a correction to make. A gargantuan dragon appears at 85N35E, breathes a line of acid straight down at 20cc, then shifts to 85N40E. 20cc dodges the acid (34+2=36 Ref save) and takes 28 points of acid damage. 20cc has 71 HP remaining.