Tara Pacific expedition - november 2017 Napoleon or Humphead wrasse (Cheilinus undulatus), hiding under staghorn coral (Acropora sp.). The Napoleon wrasse is long-lived, but has a very slow breeding rate. Individuals become sexually mature at four to six years, and. Males are typically larger than females and are capable of reaching lengths of up to 2 m and weighing up to 180 kg. Females are known to live for around 50 years.live for around 50 years. D: 22 m, Inglis Shoal seamount, Kimbe bay, Papua New Guinea