This makes the plankton more vulnerable and minnows go on a feeding frenzy. This in turn stimulates the larger predator fish to feed on the minnows. When the pressure rises again, the plankton sinks back into the weeds and down to the bottom. The baitfish and game fish are gorged with food and go into hiding so they can rest and digest until the cycle starts over again. The brightness of daylight can make a big difference in fish behavior, for several reasons.
Bright sunshine causes most water plants, including algae, to grow better.
Plants produce oxygen, and this is advantageous for the general well-being of everything living in the body of water. The plants and algae also grow faster and multiply better in bright sunlight. This is good if there are enough planktonic animals to eat the surplus, because the zooplankton will then also reproduce rapidly, providing more forage for minnows and thus more minnows for the game fish. However, overproduction of algae without sufficient grazing by the zooplankton will cause the water to turn scummy and actually block sunlight from reaching the submerged plants. This can cause fish to become suffocated for lack of oxygen, and the consequences for the angler are not good.