Went down for a gooi at Bontkop about 5:30am, 1st bait of the morning was quickly nibbled off by what was probably a small elf.Made my next cast and was just starting to relax when I felt my rod being pulled down slowly and steadily,after leaning into the fish (lets call it that for now) I realized this was something substantial,then it took off straight towards robben Island and line was peeling off my torium, not fast but at a slow steady pace,after it had taken about 200m of line I then wound my drag to max and still the thing kept going, I then started palming the spool and eventually managed to stop it briefly and I held station, whereupon it decide to head north, after about another 150m or so I decided something had to be done as, the fish was going to drag my line across the kelp beds, I managed to stop the fish again and I feltI had turned it, then as i started to try and retrieve some line, my 16kg maxima trace parted! On checking my trace afterwards I found it had snapped cleanly, small consolation was that all my knots held and that the carbontex washers were superb throughout.I don't think this was a seal as the one's I've picked up in the past usually swim parallel to the shore and then head out to sea and I've never been able to stop one let alone turn it....any ideas?