Artanis replied by simply nodding his head in understanding as he had seen the poor fellow on the floor due to the worm. Whether Mycah actually saw the nod or not wasn't any of his immediate concern.
I still must discern if we are safe on this end or not.
Unless Artanis has been notified by the rest of the group that the beast is dead (as it was in the tunnel there was no way he could have seen whether it was dead or not) he will not cease his current actions.