A lot of the newer pontoons will run 40 mph plus, and some of the tri- toons will run toward 50 plus. I work for a boat manufacturer and we build pontoons that will handle up to a 300 hp and ride like mama's Caddy. Just depends on what you want to spend. Not hard anymore to spend 60 k on one.
In ga these are actually chain pickerel, or also known as jack fish. They are in the pike family but just smaller. Will get to about 5 lbs at the biggest.