
Parasite
Biological Context
The term 'parasite' in biology often implies harm to the host organism.

The oak tree was infested with parasites, causing it to weaken.
Host Specific
Some parasites only live on specific hosts and are not found elsewhere.

The panda bear has a unique parasite that does not affect any other species.
Not Always Visible
Parasites can be microscopic and not always seen by the naked eye.

Despite being invisible, the microscopic parasites were causing him discomfort.
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BloodsuckerDeadbeatLeechLousePestPredatorSpongeVerminVulture
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