There’s actually been quite a few threshers caught and others lost at the pier over the years. A lot of smaller ones have been caught by people just fishing for kahawai with small bonito baits, one guy I know of has caught two. Months are usually December – February as far as I know. Blue sharks 7 foot+ were around for a month last year you could see them swimming around few forum members got one each and other people were hooking and losing them. The blues were around in March I think. Sending kahawai or big mullet dead or alive out under a balloon/float over the summer months when the water temp is up is your best option. There’s no doubt they’re there.