Number9 said:
Ding, Ding, Ding.
Unicorn Leatherjacket is correct. I was going to give the hint that it has a leathery looking/feeling skin because of the very tiny scales but we don't need that now. or the fact that it has a long spike on it's head. To be complete it is;
Unicorn Leatherjacket - Aluterus monoceros in the family Monacanthidae also Unicorn leatherjacket filefish
The next question is; How did #9 know that?
You win a free all expenses paid* guided fishing trip with Jimbo at Boynton Inlet. Trip includes bait, fishing tackle and continental lunch (peanut butter or cheese crackers and a diet coke)
*excludes air fair, accommodations and transportation.
http://en.wikipedia.org/wiki/Unicorn_leatherjacket
http://www.thejump.net/id/unicorn-leatherjacket.htm
http://www.fishbase.org/identification/SpeciesList.php?class=&order=&famcode=517&areacode=&c_code=&spines=&fins=&resultPage=1&sortby=species (row three)
https://www.youtube.com/watch?v=HXAL4Py23wc