Heat Wave

[OldTimer]

Don’t forget that the oxygen content of water is inversely proportional to the water’s temperature.

This fact is one variable that drives a fish’s “comfort zone” as well as its corresponding level of activity.

In a lake, fish can go deeper to find a comfortable temperature with suitable oxygen levels. Their finned prey will do likewise which further prompts the move.

In a river, fish do not have this option, so they will adjust their activity to the times, and the feeding opportunities that take the least amount of effort.