This is a ritualistic fisherman of Barma planet.
They gather the fishes using that pole. the energy catches the fish like in a force field and kill it instantly and the better, it's painless.
the ritual consists of a Girl singing to gather many and many exotic fishes. The young fishermans catches one fish each and turn them to their girlfriends, who becomes their fiances.
(Barma has an infinity of exotic fishes, there's much natural cross-breeding, leaving literally infinite possibilities)