The worms are slow-moving, large mouthed animals. These
animals look as if they were pulled straight from ancient
Greek mythology, in which is told the story of the monster
Ladon. One of the monstrous offspring of Typhon and
Echidna, (the others included the Hydra, the Nemean
Lion, the Sphinx, Cerberus, the Chimaera, etc.) Ladon
is described in the 11th Labor of Hercules as a monster
whose enormous mouth took up half of it's half-mile
long body. In a similar way, the worms of Rubi-Ka have
enormous mouths that take up a good portion of their
body, and are punctuated by large fangs.
Worms move about inchworm-style, compressing their
midsections and expanding forward, but they do so at
a very slow pace, attributable to their considerable
girth. Their dental structure and jaw do not suggest
that these animals are scavengers. The most likely scenario
is that these animas lie in wait for their prey, and
when a hapless beast strays into their open jaws, they
quickly snap shut, killing the prey. Additionally, the
animals are capable of stunning their prey with a projectile
chemical, and their teeth can be used to spear prey
that lies just beyond the range of the worm's jaws.
All in all, these strange creatures have been equipped
with plentiful weapons to make them efficient predators.