What kind of fish is the black fish with big teeth on the Discovery Channels Blue Planet commercial?

I think it's a bumphead parrotfish. I was wondering about this fish to for a while but that's what i think it is. Here is the picture that I found of it





http://www.flickr.com/photos/paoloburlin...





The parrotfish lives around coral reefs and use it's big teeth to grind down coral into sand for distribution. They also use it to scrap off algae to eat, which keeps it from clogging up the reef system

What kind of fish is the black fish with big teeth on the Discovery Channels Blue Planet commercial?
angler fish