I believe fish metabolism is affected at both ends of the scale.
cold, fish have low metabolism, feeding cycle is narrowed to optimum time, fish stay
out of heavy current unless it benefits them or, they have little choice due to locale.
warm, metabolism increases, they need more food because of this. window of feeding widens.
too warm, fish slow down, just like us. They seek fast oxygenated water and I've found that feeding
switches to shallow water and oxygenated water that is subjected to locally lower temperatures and
fall off's from freshwater etc. Anywhere where the wind, the swell or the current activates the water is
where the fish will need to be. Metabolism is still high, motivation is lower.