Victor:
Ihave no plan to get into flyfishing yet, but who knows? May be if I have the chance to see Jim fight a YFT on fly I will rush to the nearest flyfishing shop (that will be CoHo in Singapore I think, not exactly very near)
Jim:
Look at this section for YFT on popper report, find one with YFT or Tuna in the subject:
http://www.fishyforum.com/f52/
This one is my last trip there, there is also a picture of their stomach content so you can get some idea on what their diets are
http://www.fishyforum.com/t3301-2/
When they're in feeding frenzy, they will hit anything that moves on the water, as long as it's
small. The depth of of the water column is only about 40 meters, but sometimes they're in deeper area too (about 150 meters)