Kamazotl are strange monsters - they're not exactly sapient, and some ka question if they're really more than just slightly-clever pack-animals like wolves or the great cats. Large, brutish, flightless, a bit like ogres in build, they are scavengers, eating whatever (or whoever) falls to the cavern floor from the Kalang colonies overhead. They, alongside the giant beetles, parasites, and other vermin roaming the depths, are the primary danger within a Kalang cavern, and why walking is rare in their colonies except over special pathways made for such travel.
None are too sure where they came from, or how they find their way into the caverns, but eventually, given time, they will be found dwelling there so long as the Kalang themselves do, and should the colony move or be sliminated, the Kamazotzl eventually leave as well, once things cease to drop into their realm from overhead.
In a word, they are the bogeymen of the Kalang, except they are not myth, but real.