What are the Lekgolo in Halo? Episode 3's deadly worms explained

Episode 3 of the Halo TV series features an attack from a wriggling mass of worm-like aliens known as Lekgolo but just what are these fearsome foes?

Halo 5: Guardians The Story Behind Spartan Locke - The Game Fanatics

Halo – Sacred Icon

Halo 5: Guardians – Sacred Icon

Halo] How do Hunters/Lekgolo die? : r/AskScienceFiction

Mgalekgolo - Species - Halopedia, the Halo wiki

Hunters (Team) - Comic Vine

Halo: The Television Series episode 3 discussion thread : r/HaloStory

Halo Nightfall Episode 5: Devil Take the Hindmost Teaser Trailer

Which species are immune to the flood in Halo? Why, and how? - Quora