Hello.

I have a pond that was completely froze, and in complete darkness for about 6 weeks.

How Yellow-perch feed, they don't see their prey, they hunt by the vibrations the prey make.

Or they don't eat.
A+

Correct. That is what lateral lines are for in fish.....

..and those lateral lines are pretty high tech too, because perch have no problem avoiding my jigs. :-)