Humphead wrasse
The largest reef-dwelling wrasse, known for its forehead hump and endangered status.
This large marine fish inhabits coral reefs across the Indo-Pacific. It is a top predator that feeds on invertebrates and is heavily targeted by the live food-fish trade, leading to severe population declines.
- Largest wrasse species, reaching 229 cm and 191 kg.
- Protogynous hermaphrodites change sex from female to male.
- Critically endangered due to live food-fish trade overfishing.
- Feeds on toxic crown-of-thorns starfish and sea urchins.
- Major export hub is Sabah, Malaysia, despite bans.
What it is
The humphead wrasse is the largest living member of the wrasse family. Males can reach lengths of nearly two metres and weigh over one hundred and ninety kilograms. They are distinguished by thick lips, black lines behind the eyes, and a prominent hump on the forehead of larger adults. Their colour ranges from olive green to vibrant purplish-blue with yellow wavy patterns. Females are smaller, rarely exceeding one metre. Adults typically live alone or in pairs, though small groups may form.
Where it lives
These fish inhabit the Indo-Pacific region, stretching from the east coast of Africa near the Red Sea to the Pacific Ocean. Juveniles prefer shallow sandy areas bordering reefs, while adults occupy deeper offshore slopes, channels, and lagoons. They are commonly found on steep coral reef structures at depths between two and sixty metres. The species acts as an umbrella, meaning protecting its habitat benefits many other sympatric species with smaller ranges.
How it lives
As opportunistic predators, they consume mollusks, sea urchins, crustaceans, annelids, and toxic species like crown-of-thorns starfish. They often excavate prey from sand using water jets or rely on stingrays. Some individuals crack urchins against rocks using sideways head movements. They occasionally hunt cooperatively with roving coral groupers. Juveniles hide in dense branching corals and seagrass, whereas adults patrol open reef edges with limited home ranges.
Breeding and life cycle
Individuals become sexually mature between five and seven years old and may live for thirty years. They are protogynous hermaphrodites, with females changing sex to males around nine years of age. During specific seasons, adults gather at the down-current end of reefs to form spawning aggregations. They likely do not travel far for these events. Eggs are tiny, spherical, and pigment-free, eventually settling near coral habitats.
Fish and people
The species is highly valued as a delicacy in parts of Asia, particularly in Malaysia, where it commands high prices. The Philippines, Indonesia, and Malaysia are major exporters. Illegal, unregulated, and unreported fishing is the primary driver of trade, despite CITES bans. Smuggling occurs across borders, facilitated by weak enforcement and lack of alternative livelihoods for local fishers. It is also sought after for the marine aquarium trade.
Status and threats
Listed as endangered due to severe population declines, notably a ninety-nine percent drop in Sabah, Malaysia. Overfishing for the live reef food-fish trade is the main threat. Destructive methods like cyanide and bombs, habitat loss, and domestic consumption further endanger the species. Various countries have implemented bans or permits, such as protections in Australia and Taiwan, but illegal trade persists due to inadequate monitoring and accountability.
Questions people ask about Humphead wrasse
What is the scientific name of the humphead wrasse?
The current scientific name is Crassilabrus undulatus. It was previously classified under the genus Cheilinus before genetic studies revealed its closer relationship to the Epibulus genus, leading to its reclassification in 2025.
Why is the humphead wrasse considered endangered?
Its populations have crashed due to intensive targeting by the live reef food-fish trade, especially in Southeast Asia. Destructive fishing techniques, habitat degradation, and illegal smuggling persist despite international trade bans and local protection laws.
How does the humphead wrasse hunt its prey?
They are opportunistic predators that eat invertebrates like mollusks and sea urchins. They may excavate buried prey by ejecting water or use stingrays to uncover them. Some crack urchins against rocks using brisk head movements.
Where can you find the humphead wrasse?
They inhabit coral reefs across the Indo-Pacific, from East Africa to the Pacific. Juveniles stay in shallow sandy borders, while adults prefer deeper offshore slopes, channels, and lagoons at depths up to sixty metres.
Good reading and sources
- Humphead wrasse on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Humphead wrasse", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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