Do aspetto (that is lying in waiting ambush on the bottom ) in areas where fish will trafel through and shoot up to the surface using the light to your advantage. The fish will appear as darker shapes in the water with the light coming from above them. This is a time consuming method of hunting but if theres fish it will work.
Or just wait for the water to clear

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Dive safe and shoot straight
- Hénré -
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"Thinking is the hardest work there is, which is probably why so few engage in it"
- Henry Ford -