That fish would be the worst to eat, hands down.
Although rocky mountain oysters are second, because their disgusting but not that bad to eat.
Not bad looking? http://t2.gstatic.com/images?q=tbn:2aZ2awLtWn_2XM:http://www.nuffy.net/pics/articles/food/strange-food-Rocky-Mountain.jpg
Being prepared... http://t1.gstatic.com/images?q=tbn

FOV8RWxHoqjmM:http://www.dba-oracle.com/images/cul5.jpg
The source. http://images.google.com/imgres?imgurl=http://z.hubpages.com/u/100330_f260.jpg&imgrefurl=http://hubpages.com/hub/Rocky_Mountain_Oysters&usg=__J56OFu23yWWTD80m5anJdKrqJmk=&h=178&w=260&sz=11&hl=en&start=17&um=1&tbnid=e2awaST0rZhDYM:&tbnh=77&tbnw=112&prev=/images%3Fq%3Drocky%2Bmountain%2Boysters%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US

fficial%26hs%3Dq3K%26sa%3DN%26um%3D1
(Sorry, tired and couldn't find better pictures)