what i found to work for those skelm melkbos kobbies, is a bass hook. 5/0, but the straight shank, not the curved worm one. Owner makes a nice one.
You need an ULTRA sharp hook... i call it westcoast maniere, you just have one shot, it grabs once, if it's miss then it's overs cadovers. Also had lots of success with a "skelm" hook above my main hook. Caught most of my kob at Melkbos on the skelm hook and the main hook flapping around outside the fishes mouth.
At witsand this weekend the kob were doing the same. I changed tactics, rigged up west coast style, bass hooks and anchovie, with chokka.... WHAP WHAP, vas pappa!!!