Q: How to write a problem statement on the effect of climate change on fish farming?

A research problem is an area of concern or a gap in the existing knowledge that points to the need for further understanding and investigation. The problem statement briefly explains the problem that the research will address. One way to do this is to define the ideal situation and then the actual/current situation and explain how your study proposes to address this gap between the actual and the ideal.

The topic of your research is climate change and how it affects fish farming. So, you can first describe what the state of fish farming would ideally have been like if there was no climate change. Then you can describe how climate change has had a damaging effect on fish farming. Finally, you can briefly state how your study proposes to address this problem.

Here is a step-by-step guide that will tell you how exactly you can write a great problem statement for your paper: The basics of writing a statement of the problem for your research proposal