Long nose

Of the myriad of butterflyfishes with yellow, white, and black markings that occur here, the longnose butterflyfish (lau wiliwili nukunuku 'oi'oi) has the most distinctive profile, with its very long snout.

It also has a dark color phase, which I had never encountered before.

Dark phase longnose butterflyfish heading to the right.

Tail visible to the left.