The Avolakia is a monster from the D&D Third Edition Monster Manual II. It's a ten-foot-tall wormlike aberration with insect legs and octopus tentacles sticking out in a radially symmetric pattern and a mouth that opens up into 3 "flaps" like the sandworms from Dune. Overall, it looks like someone took one of the man-eating worms from the "Tremors" movies and turned it inside-out. Like many Third Edition monsters (see also: Ixitxachitl, Neogi, Unbodied, Glimmerskin) it had a level adjustment and favored class for conversion into a playable race despite being totally unsuitable in every conceivable way for use by player characters.
Avolakias eat undead flesh and serve Kyuss
See also: Dungeons & Dragons 3rd Edition races