Pickerel moving slower with warming water?

[Martini78]

I hit some hot spots for chain pickerel at a local reservoir yesterday. I didn't hook any, but twice I watched through the crystal clear water as the wide-open mouth of a 4 or 5 pound chain pickerel loomed a few inches behind my lure. It really seems that they are moving slower. Usually, I see them dart out from their ambush spots and hit lures pretty quickly.
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