I've had my SW
tank now for about 2 years. The other day i spotted something under the LR
. It was a crab, a big one. It amazed me that I had never seen it before. Is it ok to have this crab in my tank. I can't get a picture of it but it's about 1.5" in diameter on it body. Brownish redish. It also has a pair of legs that are positioned in the upward direction upposed to the downward facing legs. these two legs are the second from the front(this my be normal for all crabs). And it has two clampers in the front(not the fans for filtering water). It spends its time sifting through the sand under the rocks.
I know that i should have a picture and that there are many types of crabas out there, but this is all i have. Perhaps a website you may know of where i could identify it.