I spent hours when I was younger trying to get a couple fish with a slurp gun. I did slightly better with large clear nets, but it was still a total PITA. I would guess that it is much easier with professional training. But still, how many live fish can a professional collector bring in on a single dive? It can't be that many can it? Do you stick them in a bag or something while you're down there? And then how do you haul them all out of the water and get them over to the truck? Is there a crew that collects them in the water and moves them into buckets or something?