Hitchhiker found months after setup

I'm in the process of moving right now, so I've gone through a tear down process once and two setup periods. The tank has been running for a few months now with two electric blue damsels, 15lbs of live base rock, 10lbs of Ls, and grape, Brillo micro algae and mangroves. It's pretty much a 10g FOWLR tank. I'm not quite moved in yet, still a few more days of moving the large items, so I havn't kept the lights on in the tank. It's only been having natural day light in the afternon. Tonight I go and feed the tanks and here I find a PomPom crab hanging out on the sand. Kind of large (1-2" across the back) with two pink anemone's in it's claws. The orginal location for the tank was right under my TV in the living room, so there's been plenty of watching (during commercials and after work chill) and no sightings of this guy before this.

Any of you had a tank setup for a while and find something new? How long have you had a tank setup and what have you found?

 

A pom-pom with two nems. That's cool. I think you owe us a picture though.

 

Will do!