Hirudine

were a slug race that invaded Liverpool in the 2020s. They were an interdimensional race who fed on psychic energy. The Seventh Doctor thought they were just a myth. (AUDIO: Signs and Wonders)
Category:Sentient invertebrates
Category:Sapient insect species
Category:Sapient mollusc species
Category:Other dimension species
Category:Parasitic species
Category:Psychic species
Category:Myths and legends