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Halo Nightfall Lekgolo worm

An individual Thanolekgolo worm, crawling down a rock face.

Thanolekgolo is a form of Lekgolo.[1] The Thanolekgolo colonies present on the Alpha Shard of Installation 04 were resident specimens there, and were part of a failed plan of the Forerunners to combat the Flood,[2] presumably because their lack of a central nervous system made them immune to Flood infection.[3] The Thanolekgolo, are attracted to any form of technology, and will travel in swarms to consume it. They are also very aggressive and will attack any living thing on sight.