Grudeks

Grudeks harvest living Leviathans for toubray, a neural cluster tissue which many cultures consume to improve their brain function. They have an unkempt appearance, with scraggly hair and gruff, Russian-esque accents. A group of Grudeks, led by Ilkog, board the dying Leviathan Elack in the Farscape episode "Crichton Kicks."
Despite their apparent simple-mindedness, Grudeks have a precise order of operations. First, they ram their ship into the Leviathan's hull, incapacitating both the Leviathan and its Pilot. Next, they clear out the Leviathan's passengers and crew with gas cannisters and Brindz Hounds. Finally, they are able to harvest the toubray, a process which slowly (but eventually) kills the Leviathan and Pilot. 
Grudeks live in or around Scarran space and use Scarran currency.
==Sources==
**SciFi.com "Lifeform Encounters: Grudeks"
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Category:Farscape Culture