On second thought, maybe they do. I see what looks like a balancer protruding from the area between the eye and the gill in the first pic at the top of this thread...
By the way, does anybody happen have this paper? If so, I'd appreciate being sent a copy...
Crawford, A. J., and D. B. Wake. 1998. Phylogenetic and evolutionary perspectives on an enigmatic organ: the balancer of larval caudate amphibians. Zoology 101:107-123.
Benjamin, I don't know if it is eating yet as I'm raising it in tank crud (or "muck" if you prefer), the same way I raised by Taricha larvae, as there are lots of tiny organisms in there to feed on. I just put in a clear case temporarily for the photo. It's a bit hard to observe in its regular container.