Organism That Lives Off Another Organism
Puzzle 3 of Teamwork Pack
Question is: Organism That Lives Off Another Organism
and the answer is: PARASITE
Word Meaning:
PARASITE — (biology) An organism that lives on or in another organism of a different species, deriving benefit from living on or in that other organism, while not contributing towards that other organism sufficiently to cover the cost to that other organism.
Definitions from Wiktionary.