I see you still dont get it. And its getting sillyer everytime. Its obvious you know nothing of Bass, and fishing them once or twice in BC and a bit in Ontario for a couple of days just doesnt cut it. So heres a visual aid.
As the chart shows, the temperature difference between smallmouths and the first trout on the list have close to a 8 degree temp difference. Smallmouths are a degree warmer than walleyes.
Thats kinda huge and important, no?
Even perch are 4 degrees warmer than the first trout on the list. One reason why you will never see them invade higher colder trout bearing streams. They have been in the bow for decades and havent reaped the horrors of decimating and outcompeteing high mountain trout. Unless the global temp raises 5 degrees, we will never see them invade.
As for the imaginary line, well, if you dont see it, You have to get river fishing more.
STEELHEAD
For other anglers...... Read and know this chart and get a thermometer. It contains secrets that will unlock a whole new world of fishing and its information has been the basis of anglers, both commercial and recreational, since humanity has been angling for fish.
Why? because it works.