Q: There is a lot of fishing advice relating to water temperature and thermoclines, but what exactly is a thermocline and how does it affect game fish? - Rick Weisbaum, Tampa, FloridaA: Wind mixes the warm upper layer of the ocean -- down to depths of a few hundred feet, depending on the strength of the winds and currents -- so water temperature changes very little between the surface and deeper water. Logically, that warm upper layer of water is called the mixed layer.
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