Sewer Mutants are a race of beings from Earth, a world in another dimension. Sewer Mutants wear modern day clothing. Apparently, in mutant society, revolts are only for emergencies. Mutants also have red blood.
“Dr. Ferb is Cycus's grandfather and a lizard-like sewer mutant scientist. Write the first...Dr. Ferb
“Cycus is an armadillo-like sewer mutant, living in the sewers of Sacramento, California. Write...Cycus