Hasarian Renderer

From Tardis Wiki, the free Doctor Who reference

The Hasarian Renderer was a species of vicious, toothy amphibians. They were native to the canals of Hasaris. The only thing they were afraid of was the big queens.

Sebastiene once tracked a Hasarian Renderer by pretending to be its mother. Though it took him two weeks, he was finally able to convince her and then kill her. (PROSE: The Doctor Trap)