Justinthereefer
this is bat country
So i bought three big new rocks and put them in my tank about four days ago.Today i have noticed the one rock has a hollow spot and in that spot is living a little crab.He will not come out enough to get a pic,he looks like a spider he is hairy,and about the size of a quarter.His claws have dark orangish tips.Any ideas?Should I remove him?Also he is grey in color.