Genetic modified breeding has created an abomination of sorts, where fins once existed have split apart and grown into claw like fingers, allowing the creature to grab and tear while still effectively being able to swim.

Further research has caused the beak of the turtle to harden and shape into a set of durable razor teeth, strong enough to split most surfaces not made of metal in two, and the creature is left in a state of agony causing it to bleed from between the ash grey shell, making it naturally aggressive to most living things.

Even more, when the creature breeds, its belly swells and expands beneath it, revealing a transparent sac harboring the offspring until they hatch and tear from the stomach, where they usually cannibalize their parents for nutrients and set off on their own to repeat the cycle...