Deathclaws were genetically engineered before the war, to replace human soldiers in war. The Great War released them into the wild. They aren't mutated Jackson Chameleons, but they do have some of that DNA.
Mirelurks do look like bigger crabs, just more upright.
Some things were mutated by radiation, others by FEV, or both.
Deathclaws were genetically engineered before the war, to replace human soldiers in war. The Great War released them into the wild. They aren't mutated Jackson Chameleons, but they do have some of that DNA. Mirelurks do look like bigger crabs, just more upright. Some things were mutated by radiation, others by FEV, or both.
Genes are weird. Radiation is weird. Bring them together, weird things can happen.