Parasites

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Invertebrate organisms that live on or in another organism (the host), and benefit at the expense of the other. Traditionally excluded from definition of parasites are pathogenic bacteria; fungi; viruses; and plants; though they may live parasitically. [NALT]

An organism that lives at the expense of another (host) during some portion of its life cycle. Usually a parasite does not kill its host. [AGROVOC]

Narrower Topics

Ectoparasites

An ectoparasite lives outside the host's body, on the host's surface. [AGROVOC]

Related Topics: Fishes, Parasites, Fish Health Management and Welfare

Plant parasitic Nematodes

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