Thresherlord was supposed to be just another stable Shark Warrior mutation. However something went wrong. Whether some additional green ooze was incorrectly added or not, no one knows. Indeed even Gorg has been unable to replicate or even clone Thresherlords mutation.
Highly intelligent, Thresherlord seems to have some telepathic control over all of the other Shark Warrior mutants. To Gorg, this makes him dangerous and therefore a creature to be wary of despite Thresherlords seeming loyalty.
Like all Shark Warriors Thresherlord has powerful jaws which can slice through tank armour like it was tinfoil. It has been noted after the first Shark Warrior assault on the Red Star capital that Shark Warriors seem to take a particular exception to ground based tanks and vehicles. Seeing such enemies seem to drive them into a feeding frenzy much like Earths chickens who have found a group of particularly juicy worms.
Thresherlord is no exception to this fixation. However it also pays for Bots to be wary of Shark Warriors too. A large group of Shark Warriors would mean almost assured destruction for any Bot, including the titan Bots like Leviathan and Destroyer.