All of my briareus just stayed out until it got dark and they were alone on their introduction to my tanks. Definitely some stress signs (colapsed mantle and corkscrew arms in post #5). Lets hope they are not age related and will disappear in a week. The arm to mantle ratio reminds me of Creepy and makes me think this one has put all of its arms in moray holes/crab dens as some points in its life.