Can someone help ID this tang for me?

[OrionN]

Whatever it is, it will be one huge tang. Much bigger than most reeftank.

 

[nereefpat]

@4FordFamily ,

You have an opinion?

 

[4FordFamily]

Seeing it coloured up, I’m pretty sure it’s actually an Acanthurus chirurgus - The Doctorfish Tang.
These are another that when they’re not coloured up they can look similar to Blochii.

It is darker than I would expect for a chirurgus but I cannot rule it out. To be honest with acanthurus tangs I hear are several that as juveniles they’re very very difficult to ID. Some as adults can be difficult (Fowleri, barienne, dussumeiri, etc).

This is why the origin of the fish is useful, as it narrows everything down. I do agree though, it looks like it’s likely a darker acanthurus chirurgus to me.