Reef fish

Humphead wrasse

Cheilinus undulatus

IUCN status: EndangeredBucket-list species

The giant of the wrasse family, growing past 1.5m with thick lips, a bulging forehead hump and maze-like markings around the eyes. Often curious and willing to approach divers, it patrols coral reefs and drop-offs. Endangered globally and listed on CITES Appendix II, largely because of the live reef-fish trade.

Max size
Up to ~2.3m and 190kg
Habitat
Coral reefs, slopes and drop-offs

Best places to dive with Humphead wrasse

rareoccasionalcommonly seenpeak season
Baa Atoll
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
Marchcommonly seen
Aprilcommonly seen
Maycommonly seen
Junecommonly seen
Julycommonly seen
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Octobercommonly seen
Novembercommonly seen
Decembercommonly seen

A territorial reef resident, present year-round on Baa's outer reefs — one Baa site is named Napoleon Reef for its resident giants.

Fakarava
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
Marchcommonly seen
Aprilcommonly seen
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Julycommonly seen
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Decembercommonly seen

Napoleon wrasse are resident along both passes and the drop-offs, large and curious. The IUCN lists the species as Endangered. Reliable year-round but as individuals, not schools.

Northern Red Sea
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
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Resident year-round and most reliable at Shark Reef (Ras Mohammed) and Ras Umm Sid, where individuals are used to divers and often approach closely.

Palau
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
Marchcommonly seen
Aprilcommonly seen
Maycommonly seen
Junecommonly seen
Julycommonly seen
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Resident giants at Blue Corner.

Ribbon Reefs & Cod Hole
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
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Maycommonly seen
Junecommonly seen
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Decembercommonly seen

Resident on the Ribbon Reefs (locally called Maori wrasse); commonly seen at the Cod Hole and along outer reef walls. Endangered globally, protected in the Marine Park. Not seasonal.

Tubbataha Reefs Natural Park
Sighting likelihood by month
MonthLikelihood
Januarycommonly seen
Februarycommonly seen
Marchcommonly seen
Aprilcommonly seen
Maycommonly seen
Junecommonly seen
Julycommonly seen
Augustcommonly seen
Septembercommonly seen
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Napoleon (humphead) wrasse are common on the walls here — Tubbataha holds a healthy population of this endangered species.

Bunaken
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon wrasse are drawn to the cleaning station at Fukui Point and cruise the exposed walls; large individuals are seen but they are wary.

Komodo
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon wrasse are reported cruising past at Batu Bolong, Crystal Rock and German Flag through the year. Individually large and often solitary, so encounters are per-dive luck rather than seasonal — coded occasional, year-round, with no month weighting. Listed Endangered on the IUCN Red List, and Komodo's protected status is part of why they are still here.

Moalboal
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon (humphead) wrasse are reported on the Pescador wall; encounters are hit-or-miss.

Similan Islands
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon (humphead) wrasse are regular visitors to the larger reef and boulder sites. IUCN Endangered; sightings are occasional, not guaranteed.

Sipadan
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novembernot seen
Decemberoccasional

On the reef (Sipadan closed in November).

Vava'u
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon (humphead) wrasse are reported at Fingers and Whale Reef year-round. Single large individuals, not groups.

Wakatobi
Sighting likelihood by month
MonthLikelihood
Januaryoccasional
Februaryoccasional
Marchoccasional
Apriloccasional
Mayoccasional
Juneoccasional
Julyoccasional
Augustoccasional
Septemberoccasional
Octoberoccasional
Novemberoccasional
Decemberoccasional

Napoleon wrasse are seen on the walls and along drop-offs; large individuals are present but not on every dive.

Sources & last checked

Checked July 2026

This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.

Note on the data: Shared species (Northern Red Sea and Baa Atoll). Commonly called Napoleon wrasse in the Red Sea.