Your tank is coming along well, you got one of those funky "furry crabs"...They seem to be hitchikers from mars because I have come across them in my tank too on startup. They tag along with the LR but not a trainsmash for right now, I have been told that a Wrasse will sort them out in no time. You will also get other randon weird thing popping out of all sorts of crevises which the Wrasse is said to have a full course meal of. The info I have been given is that the Wrasse will eat the junk you don't want but leave the goodies on your LR you need - when I got my LR it took about a week before it suddenly "came alive" with all sorts of creatures which kept me amused for hours in spotting new things...brilliant hobby and wouldn't have it any other way...
Bud a wrasse is a predator. It hunts all live food. So say good buy to all invertebrates.
Oh and the wrasse needs to be a big fella to worry a teddy crab.
Tip Never put a wrasse in a reef tank. You will regret if you do.
. I added 2 hermit crabs over the weekend
and 3 small pices of live rock which had a one or two mushrooms on them. Thanks megalodon