They're fresh ones he got mate so yes they would have to be peeled and as said, subject to the size of them and the hooks yer using, you might get two chucks off the one peeler. If yer using frozen I personally take them in a flask and what I don't use stays frozen and is put back in the freezer after the sesh without it having thawed. I also like to bait up with a frozen crab when it's just starting to thaw, so take one from the flask a few minutes or so (depends on the ambient temp) before reeling in for the next chuck. They're easy to tie on in this state and will probably completely thaw by the time they hit the sea bed. if you thaw a one out and then try and tie it on it's a nightmare and a good chuck won't do it any good either.