60-65 degrees in my opinion is optimal......colder water may have more oxygenation but it tends to make them a bit sluggish......I just feel the 60-65 range is a bit more to their liking.....best fighting fish I have ever seen was over Cutty......full on out of the water, talkin' fish up to 30 pounds here! Hook em' and quite a battle! However I also think as others have said its more about the oxygenation of the water than the water temp....but you put the right temp along with good moving, highly oxygenated H2O and you will see some aerobatics and some good pull from the other end.....rocky areas seem naturally better oxygenated imo!
