Thanks Ian for the trap. I think I'm dealing with mantis shrimp and don't think it can go through the bottleneck. I also tried a cup method, but no success, I don't think it ever climb on rocks and I'm pretty sure this thing live in the sand bed under rocks. 
I will post my progress here. 
		
	
		
		
		
		
			
				__________________ 
				My Wishlist : Golden Frogspawn, Blue Hammer, Red Suncoral, Blue Frogspawn, Rhizo
			 
		
		
		
		
	
		
		
	
	
	 |