Big fish and his family were coming home from a long day at work and school when it started raining. This didnt really matter becasue they were in water anyway. Rain never effects them too bad.
Once he got home he realized his family wasn't with him so he started swiming back to find them. He thought he had just swam too fast and left them behind. when he went back and found them all on their backs he knew what had happened.
When he went back he found them all turned on their back. At firdt he thought they got tired and took nap but he soon realized that the acid rain had gotten to them and now he didnt have a family. acid rain is very dangerous. it is around a 4 on the pH scale.