I had never heard of this fish before. Very interesting. There is video at the bottom of the article. 
http://www.mbari.org/news/news_releases/2009/barreleye/barreleye.html
http://www.mbari.org/news/news_releases/2009/barreleye/barreleye.html
They think it is because the fish steals food from jellies. Having the eyes insides keeps their eyes from getting stung. It is odd though because I cannot get over those nostrils in the front they look just like eyes.Now that is freaky. I wonder what would cause a fish to evolve this way? What is the purpose of a see through head?![]()