Guys I know it's mussels. The line was just touching the mussels, a centipede doesn't weight much at all, and it was shaving the line, actually leaving long shreds and nicks between the weight and the bait. It's impossible for it to be a guide as this part of the line wasn't going thru any. I retied and cast a couple of times to double check what I was seeing. Had the line cut on a couple of fish that hit also on a fresh setup.