hand-tie steel leaders

The wahoo, or Acanthocybium solandri, is a large mackerel found in tropical waters all over the world. Although its numbers are plentiful, it swims solo rather than in schools. Unlike similar fish, there is only one species of wahoo. It's never evolved into anything else.

Its snout measures half the length of its head, and its powerful jaws are lined with razor-sharp teeth. It's like a tube-shaped dinosaur. The dorsal fin folds down into a slot down its back, streamlining the fish into the ocean's fastest creature with gills. Wahoos have been clocked at 60 to 75 miles an hour. They routinely snap off regular monofilament fishing lines, and can bite an artificial lure in half.
The world-record wahoo caught on hook and line is 158 pounds, but some reports say it can grow as large as 218 pounds. Because it's so difficult to catch, there are no limits for either numbers or size.
Wahoo is often served in restaurants as a white steak, similar to tuna or swordfish, and listed under the name ono (Hawaiian for sweet or delicious). According to one legend, early European explorers discovered waters filled with such fish along the coast of Oahu. When they looked at maps, Oahu was often spelled "Wahoo," and the name was given to the fish.

Chasing down wahoo is an expensive sport, and many charter operations don't bother. You must painstakingly hand-tie steel leaders to the monofilament lines in order to withstand the wahoo's powerful attack. You can't use steel leaders for some other fish, like tuna, because they can see them easily and will ignore the bait.