Pole and line
Catching tuna one at a time with poles and hooks as a school feeds at the surface, with very little bycatch.
Also: pole-and-line fishing
In pole and line fishing, a crew throws live bait fish into the water and sprays water on the surface to make a school of tuna feed close to the boat. Fishers then hook the tuna one by one on short poles and swing them aboard. Nearly all the catch is the target species, mainly skipjack. The Maldives and Lakshadweep have fished this way for centuries, and it is also used in Japan, Indonesia and the Azores. It needs a steady supply of small bait fish caught from reefs, which has its own limits.