Not something that I took out of the tank that the rock came from...so I am assume that classifies him as a hitch hiker even though I picked it up from another hobbyist.
I'm curious If I was to order rocks say from live aquaria will their be "hitch hikers" on them? Or do big companies remove them....at the lfs by me never has any hitch hikers on the rocks that I purchased (2-3 tiny tiny snails....100s bristle worms)...
When I had saltwater I had bristleworms, a limpet, and even a teeny little lobster come from live rock. The lobster was my fav, but he just vanished one day.