About that fish on the field in Japan. I live down the street from Koshien Stadium. If a fan through that fish on the field, it would have had to be an amazing throw. The fish was found about 20 meters from the stands and there are pretty good fences all around so it would have to have been much further up! The fish was about 25cm long according to one article.
http://www.asahi.com/articles/ASJ5B66B2J5BPIHB03W.html
http://www.sankei.com/west/news/160508/wst1605080064-n1.html <-- picture of the clean up here
If you haven't seen a game at Koshien, you haven't watched baseball.