Parasite

Relationship between species where one organism lives on or in another organism, causing it harm

Parasite
Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson characterised parasites as "predators that eat prey in units of less than one". https://en.wikipedia.org/wiki/Parasitism

Episodes