I've only fished off the wharf but you can get legal blue cod there. Also get a lot of baby tarakihi but wouldn't expect the bigger ones to be around. Heard of trumpeter, moki, blue cod, red cod, warehou, gurnard, skate, stingrays, conger eels, barracouta and various sharks there. A guy also told me they get crays around the pilons of the wharf. Apparently there's quite a few spots off the rocks around there where you can get moki and trumpeter as well but normally a lot of kelp and snags to get past.
For bait good old squid works well for a lot of different species including the blue cod and trumpeter etc but the stingrays love it and there's some big ones out there probably up to 200kg. For moki crayfish or shellfish baits are meant to be good but also prawns you can buy at the supermarket work