While I have not trolled from a less than 25 ft sailboat, I have trolled literally thousands of miles from a bigger yacht. In the West Indies it was standard practice to drag a line with yellow feathers as we sailed between the Islands. We caught a whole gammut of fish, but seems that the primary catches were Baracuda and Mahi Mahi. One Day we hooked up a marlin though we never landed it.
We regularly trolled on trans Atlantic voyages and more than once hooked up with something that just kept going until we were spooled and it was gone. Caught lots of tunny and Mahi Mahi, amd stuff we never identified but tasted good any way. More than once we caught what I called snake mackeral, long very skinny fish, maybe three or four feet with huge needle like teeth too big to fit in their mouth.
On one trip off the Florida coast while single handing, I caught a monster king fish that was too big for me to wrestle on board. I dragged it until it drown, than hooked it up to the mizzen halyard and winched it up the side of the boat.
On the sailboats trolling is a little different. First you cannot easily stop the boat when you hook up, so what you get has to be cranked in under sail, tackle has to be appropriately scaled. I used a big old Penn reel with heavy dacron line hose clamped directly to the stern rail. Maybe not so sporting, but plenty exciting when the reel sings and you have fresh meat on the other end.