i just saw a crab in my tank and i need some help figuring out if he is a bad guy. theres no way i can get a pic he's all the way in the back but i did get a good look at him. He doesnt look like a gorilla crab ive seen online he has black and white striped legs, i have seen him once before and since then none of my coral has gone missing. Also ive herd that if they have really hair legs they are bad, but this one doesnt. any help would be great thanks alot.