Mystery of the morning

[Trabby]

Well there's been a few developments over the last couple days.... Two separate attempts to bait monster turned up nothing but stranded hermit crabs.....
So then the other night... I'm on the phone.. Gazing into the tank ... And mention the menace in the tank.... No sooner did I say it... I'm having a fit because there is this HUGE crab running along the back wall with a piece of rubble.. He took cover under zoa mountain ....Aka the scene of the crime
Then again yesterday while visiting with a fellow reefer ... I bring up this crab, well low and behold two minutes later he spots the damn thing... Running with a chunk of rubble... Grrrrrr..... Bad crab..... That's where my small frag of zombie eyes gas gone .... Grrr

So aside from ripping everything apart ... I don't know how to catch him....
Any ideas? Maybe I'm not patient enough...

Oh a little more on this freak..... I looked on chucksaddiction....
Possibly Xanthid, or mithrax ... Quarter / loonie size... Still need a closer look...