What Divers Should Know About
Humphead Wrasses

Encountering the magnificent Humphead Wrasse, also known as the Napoleon Wrasse or Napoleonfish, is a true highlight on many Indo-Pacific coral reefs. This impressive fish holds the title of the largest wrasse species globally; males can reach lengths of up to 229 centimeters and weigh over 190 kilograms, though an average adult tends to be around 60 centimeters. Easily identified, look for their distinctive thick lips, a prominent hump on the forehead of larger individuals, and two black lines behind their eyes. Their coloration varies from olive to vibrant greens and purplish-blue, often with a pattern of yellow undulating lines on the head.

Divers commonly spot these majestic wrasses in depths ranging from 2 to 60 meters, particularly on outer-reef slopes, channels, and within lagoons. While often seen cruising solitarily along the reef edges, adults may also be observed in male-female pairs or small groups. These long-lived creatures can grace our reefs for around 30 years, playing a crucial ecological role as opportunistic predators that notably consume various invertebrates, including the destructive crown-of-thorns starfish.