Grunk Worm & Axarak

From publisher blurb: Visitors to the planet Mien are always warned. They never seem to listen. It is death to venture down to the surface of the planet. That might have something to do with the horrible parasitic worms that slime their way along the jungle floor. And even if you're lucky enough to survive the worms, more cunning predators hide among the foliage. For the axarak are masters of camouflage, and they're packing some galaxy's most deadly all-natural explosives.