Kerplickian louse
Kerplickian lice were a type of parasitic louse.

The crew of the Federation starship  once suffered a devastating infestation of Kerplickian lice. To avoid the embarrassment of having lost a ship to lice, Starfleet Command neglected to record the details of the incident, such as that the official logs only showed that half the Atlantis crew suddenly disappeared without explanation. ()

Animals