That is the sound that strikes fear, or at least revulsion, in most WOW players.  Whether you killed too many of those nasty creatures while leveling or you get aggro just trying to run through a lowbie zone; everyone knows that Murlocs are pervasive in the world of Azeroth.  However, there seems to be more to these creatures than we originally thought.  Find out more here about the creatures that seem to be the harbingers of more to come…