I know! The only one of mine that comes out is the tiny one that came in on a coral I bought. "Come back in a couple of months you sorry little bugger! Then I'll take your picture!" (Not really, but my gigantors who I would *love* to have a picture of are always hiding.
I did, however, finally get a picture of my porcelain crab while it was violating a large hunk of squid the cleaner shrimp had dropped in its' hole. It's not a very good picture, but at least I got one!