Context: I was out walking by the lake over the weekend and there shore was just covered in dead rotting fish.
Speaker 1: I was out walking by the lake over the weekend and there shore was just covered in dead rotting fish.
Speaker 2: what happened why were their so many dead fish?
Speaker 1: I don't know, that's what I would like to know! The best I can imagine is that the water quality dropped, and they died. I imagine it was pollution. 
Speaker 2: I hope they are not using the lake for drinking water .