Ever wondered why its called a Hippo tang?
 

Well, i now know why.
I was sitting down by the tank adjusting a calcium reactor drip rate, when i stood up the fish got spooked and darted away. On its way it broke a large colony of SPS coral that was almost half inch in diameter and didn't even get a scratch ! (well may be a quarter of an inch but still amazing)

Here is that fish for sale if anyone wants a true HIPPO LOL !:lol:
http://www.canreef.com/vbulletin/showthread.php?t=98664

Well since I came here to answer, here's the real reason:

Its scientific name is "Paracanthurus hepatus"...from the word hepa, the term "hippo" came up.

You are a spooker heh ;)

WOW Has your hippo always moved things like that? Crazy video....

I had a 5 inch and it was getting loopey in my 90. Great fish but loves to swim...

Started moving things when it got large