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?

Lekgolo - Species - Halopedia, the Halo wiki

Lekgolo, Halo Alpha

Hunters - Halo Wiki - Neoseeker

Lekgolo, Halo Alpha

Magpie Gamer

How powerful are the lekgolo (hunter's)

Hunters (Team) - Comic Vine

(Supplements D6 / Halo D6 Rules Options Sourcebook v1.3.2 (with images))

I read somewhere that these champs gave the prophets such a heavy beatdown during first contact that the prophets had to resort to threats of glassing their planet to force them into

Halo: The Covenant / Characters - TV Tropes

Halo – Sacred Icon

Lekgolo, Alien Species

Thanolekgolo, Halo Alpha

Mgalekgolo, Halo Alpha

Halo Nightfall Episode 5: Devil Take the Hindmost Teaser Trailer