I have seen it done many times but never tried it so I went out with the neighbour to have a go. So at daylight we were snuggled up close to a mussel harvester who was hard at work. The only problem with this sort of fishing is you have to put up with the head banging music played at full volume by the Maori boys who work on the Harvester.
First thing I learned was that fish that are dining on mussels will take little else. Rigged up with soft bait rod, reel with braid in the place of nylon we tried a few plastic guppys with not much success. So we baited up with mussels, tied them on the hook and started to flick them into the thick soup coming out of the mussel harvester.
Man was there some action then. We gave five fish each to two separate boats who had not caught much and still came home with enough really good snapper to be really happy. Oh and plus one large trevally.
I was amazed at the number of porore that we released I think of them more as an estuary fish but they sure hang around the mussel harvester.