epizoon

/ˌɛpɪˈzoʊɒn/
noun
  1. An animal that lives on the body of another animal, typically as a parasite.
    • A flea is a common epizoon that feeds on the blood of its host.
    • Some fish carry an epizoon that cleans parasites off their scales.
    • The scientist studied an epizoon attached to the skin of a whale.
Antonyms
What does "epizoon" mean? | whatsthatwordmean | whatsthatwordmean