Science Homework Help

I need an explanation for this Chemistry question to help me study.

A person preparing a fish tank uses pre-boiled (and then cooled) water to fill it. When the fish is put into the tank, it dies. In details, explain this using your knowledge of solubility of gases in water. Give an example of gases in water that you see in your everyday life (other than carbonated drinks and soda). Use the proper APA format to cite/reference your sources.