Can anyone identify this fish for me please ?

[Georgephoenix]

Sorry for the bad photos, I saw this fish in a public aquarium and wondered what it was.
I thought it might be a type of tang but it was darting around the tank so fast I couldn't be sure.
Thanks

 

[Dmorty217]

That's is a tang of some sort but the pics aren't very detailed to be able to say which one for sure

 

[jaa1456]

Looks almost like a chocolate tang.

 

[Reeftanks6]

Chocolate tang

 

[Georgephoenix]

Yeah just typed Chocolate Tang in on google images and this is defiantly the fish.
Thanks