I was in Phuket for 7 days in 2002, rented a boat (45ft ?), captain and 1 deck hand and went out for 3 days trolling, 6 AM to 6 PM daily. 5 rods me the only fisherman and my arms ached from tuna after tuna all days long for first 2 days. All 30-50 lbs but non stop, 42 fish in bucket. 3rd day changed to bigger gear and went to colored water further offshore (15-18 miles) looking for billfish, no bills but dorado, mahi mahi none stop all day. Think around 30, at days end also some huge snapper type fish, I kept a few fish and they kept rest for market. Best part all 3 days was 3000 baht, 1000 per day Tia lunch included, gave him $5000, exchange was 100us=4200 baht. This was not a sport fishing boat but a dowh type coastal vessel, he had 4 rods, gear, chair and knowledge. I had the gps and got spots from fishing center in town. Yes I refused the boat "extras". Most memorable trip, outstanding people, tons of fish and what fun. It was some time ago, not sure what's changed.