Hey guys, I've had a 38 gallon saltwater tank set up for about 7 months now, its reef and I have a bunch of fish and inverts
in there. Yesterday I noticed a small hole in one of my tinier live rocks, and inside it i saw two eyes peering out at me. I believe it is a mantis shrimp
but it can't be more then an inch. I must have had it for a while and nothing has gone missing, but I am worried because one of my emerald crabs likes to hang out on the rock right above this guys little hole. I took a picture but its very hard to tell, but you can see the two eyes if you look closely. Is he harmless? Any help much appreciated, thanks!