Amphibious assault warrior. Patrols the murky ocean depths, defending underwater installations. Huge webbed feet enable him to swim at over 30 knots. Giant fang-like tusks can be used to shred metal like paper. Electronic eye equipped with advanced sonar, infra-red firing scope and heat and light sensors. Armed with searing ionic field generator. Also armed with plasma cannon in robot mode. Specially reinforced ecto-suit can withstand underwater depths up to 300 feet.
Longtooth appeared in the following 16 comic books: