Yeah, those two guys are fishing nuts.
Can count myself as one also,
I do it recreationally and professionally :-)
In the fall I bury bait fish we harvest locally called Menhaden,
it was tradionally used by the Indians as a fertilizer and farmers
years ago.
Works really well, need nothing else for most vegetable crops
Today its used to extract fish oil,
its what is used in Omega-3 fish oil capsules people consume.
Been to your fine part of the world a couple of times,
I fished for Kingies and Hapaku at Three Kings and White Island,
both times with Cascade Charters.