A giant mutant human (or thing) that fused or grew into a multitude of limbs and heads.
Which brings up a intresting case in that relation; the meat.
The Jabbereock understandably is inedible due to its advanced mutated form.
Now again understandably, the giant insects, snakes and super bears are instead edible since they are only supersized, not horribly mutated.
Which I guess in that regards would also make something as mutated as a Hydra inedible as well to be so changed.
So in terms of edible mutant animals their mutations would have to be restricted to keep them from being too tainted.
Mabye like a six legged horse or multi horned deer? Man eating chickens, balding dogs, super intelligent monkeys, giant eagles, etc etc etc.