User blog comment:.Rakle./Monster Hunter Online Information Blog Post/@comment-8494024-20130703105319/@comment-11508177-20130703143713

nah, that crab like thing is maybe an abandoned design or they just canceled it before the release, there will be only the Rathian in tomorrow's test.

if you mean the question mark, it's used when your level (or HR, they used level in this tese) is not high enough to unlock the next monster