The humphead wrasse (Cheilinus undulatus) mainly found in coral reefs in the Indo-Pacific region. It is also known as the Māori wrasse, Napoleon wrasse, Napoleonfish; or "So Mei" 蘇眉 (Cantonese) and "Mameng" (Filipino) - thankyou wikipedia.
I had never heard of this beauty before, and neither had the two greatest living authorities on such matters known to me: my 11 year old grandson and my 88 year old neighbour. How pleasing it was for me to tell them something they did not already know.
I wonder when it got the Napoleon name? Perhaps someone can enlighten me?