Profile, Abilities and Weaknesses description from The Transformers G1 series by Marvel Comics.

Profile: Despite his fierce appearance and formidable weaponry, Nautilator is actually a stumbling, bumbling amphibious foul-up. Originally a land based warrior, he underwent adaptive reconstructive surgery for oceanic combat on Cybertron without ever being tested to see if he had an aptitude for the undersea environment. Once he joined the Seacons, it became apparent to everyone that he liked that environment -he just wasn't very capable, within it. His fellow Seacons have had to haul his chassis out! of tidal undertows more times than they care to admit. Some of them secretly whisper, "Let him drown," whenever he calls them for, help nowadays. They're also fed up with having to retrieve him -almost every time he goes on one of his underwater exploratory excavation missions, he usually gets lost. And to make relations with his comrades even worse, he's always quick to blame them for his mistakes. But there are very good reasons why the Seacons usually come to Nautilator's aid, as Snaptrap explains, "If he didn't bring back an occasional lost nuclear bomb from the ocean bottom, we'd have left him down there to rust a long time ago."

Abilities: In his lobster mode, Nautilator uses chemical, thermal, electrical, magnetic, seismic and sonic sensors located in his legs and tail to search for and detect underwater fuel deposits and other materials useful to the Decepticon cause. His claws have an unbreakable grip and even pierce the thickest of ship hulls with minimal effort. He wields a triple crusher cannon, a weapon that shoots energon bands that encircle and trap their target, tightening around it until only rubble remains. He can mount the cannon on his mouth, convert to weapons mode and use it in a stationary position, or use it on land in robot mode. In weapons mode, he can also convert it to a torpedo cannon; He combines with.his fellow Seacons to form the super-robot Piranacon.

Weaknesses: Nautilator suffers from a defective gyroscopic circuit center, which accounts for his poor navigational skills. He also rusts relatively easily, and can stay underwater for no longer than 4 hours without suffering damage.

Bibliography of significant appearances: 
* (Marvel) Transformers #47- All members of the Decepticon Seacon team are seen hunting the pirate treasure off the shores of "Club Con" in this episode.
* (Marvel) Transformers #49- Under the command of (gulp, I can hardly say it) "Commander Ratbat," The Seacons unite into Piranacon.
* (Marvel) Transformers #50 - The Seacons get a very brief cameo appearance in trying to lay a smackdown to a soon to be Underbase powered Starscream.
* a few additional cameo appearances in a couple Marvel UK comics, including UK #268 where the team is (relatively speaking) featured.

Other Appearances: