Leech
From Memory Alpha, the free Star Trek reference.
- You may also be looking for the TNG holodeck character Felix Leech.
The leech is a specific animal that attaches itself to another creature, usually absorbing some of its blood.
Doctor Phlox was fond of leeches as a snack. In 2154, he snacked on some leeches while dictating a doctor to Dr. Jeremy Lucas. He also fed one to a begging Porthos after warning him that it would clear out the dog's intestinal tract. (ENT: "Doctor's Orders")
