Anyone ever fished it? I never have. Not intentionally.

I was reading this old bass fishing book, and they were dithering on about the thermocline. Talking about how to see it on your ancient fish finder. Talking about how to target bass that should be living at that depth.

Never once, in all my life, have I bothered to try and find the thermocline or fish at that depth. Am I missing something? To me this is like the color-c-lector.