The humphead wrasse (Cheilinus undulatus) is a species of wrasse mainly found on coral reefs in the Indo-Pacific region. It is also known as the Māori wrasse, Napoleon wrasse, Napoleon fish, Napoleonfish, so mei蘇眉 (Cantonese), mameng (Filipino), and merer in the Pohnpeian language of the Caroline Islands.
The humphead wrasses can be located with in the east coast of Africa and Red sea as well as in the Indian Ocean to the Pacific Ocean. There are different ranges in which juvenile and adult humphead wrasses are found. Juveniles are usually found in shallow sandy ranges that are bordering coral reef waters, while adults are mostly found in offshore and deeper areas of the coral reefs, typically in outer-reef slopes and channels but can also be found in lagoons. Humphead wrasses are found in small groups or larger combinations within their habitat. source