In ET's exclusive sneak peek at 'Harpoon Hunters,' fisherman Tyler spears a nearly eight-foot-long tuna. 'Harpoon Hunters' premieres Fri. Jan. 24 at 9 p.m. ET/PT on Discovery Channel.

“Harpoon Hunters” is not ... who has to display considerable skill hurling his spear from the 27-foot extension or “pulpit” at the bow of his boat. Unlike the crabs and tuna subjected ...