"Fraught with" means filled with something undesirable, much like an unsightly anthill in the garden, a glimpse into the subterranean labyrinth fraught with fire ants. A mysterious superorganism lies beneath that mound of dirt, only revealing its tentacles when hungry. That is always, as the superorganism is fraught with hunger, always growing; expanding its influence to be a supercolony. Always growing, the lone queen laying hundreds of eggs per day. Always growing that mound in the garden.