Nautilator is a genuine card-carrying bungler in every conceivable way, shape and form. Anguished, rage-filled bellows of "Nautilatooooooooorrrr!!!" echo endlessly throughout the corridors of the Decepticon Headquarters, as both his peers and superiors struggle in vain to cope with his brand of oafish buffoonery. A total train-wreck of a soldier, Nautilator can hardly manage to swim, much less follow complicated instructions within an aquatic environment. It is often said that the only positive quality he brings to the table is his inexplicable ability to return from the ocean depths with objects of value... but only after he's sunk himself there and had to be rescued.
Of course, if one were to question Nautilator as to why he's such an incompetent doofus, he'd be quick to point a claw at anyone but himself. After all, it's certainly not his fault that the pencil-pushing eggheads at Decepticon Command chose to turn him into a lobster when he clearly had no deep sea combat training of any kind (or at the very least, they could have issued him some floaties).
When he isn't sinking to the bottom of the Atlantic, Nautilator can combine with his fellow Seacons to form Piranacon.
His alt-mode is a Lobster.