Cheilinus undulatus

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Facts
Latin name Cheilinus undulatus - Rüppell, 1835
Local name Humphead wrasse
Family Labridae - Cheilinus
Origin East Indian Ocean, West Indian Ocean, Australia, The Red Sea, Indonesia, East Pacific, Central/West Pacific
Max length 229 cm (90,2")
As aquarium fish
Minimum volume 0 cm (0 gal)
Hardiness Average
Suitable for aquarium Not suitable for home aquarium
Reef safe Not reef safe
Aggressiveness Might be aggressive towards other species
Feed
Recommended Small crustaceans (Krill, mysis, artemia...)
Larger crustaceans (Shrimp, crabs...)
Other invertebrates
Fish
Beware of
Endangered species

This species is endangered.

An effective invertebrate hunter

These fish will hunt crustaceans, sea urchins and worms in an aquarium, very effectively.

Keep in mind
Hiding places

This species needs good hiding places, for example, between live rocks.

Requires plenty of space for swimming.

This species revels in swimming and requires an aquarium with ample space.

Hermaphroditic

This species can change gender from female to male.

When a male is needed, a female changes sex and takes on the role.

Descriptions and further reading
Genus description (Cheilinus)

Fish in the genus Cheilinus are larger than most Wrasses, even up to 6.5 foot (2 metres).

These fish are a threat to most invertebrates -but not corals- and small fish. It is probably necessary to feed with living foods at first and after some time with large pieces of seafood every, or every other day.

It must be noted that even though they can be aggressive themselves when first introduced. They can easily be stressed by other fish, or indeed aquarists, before they are properly acclimatized.

Family description (Labridae)

Wrasses are nearly always seen in reef aquaria, since many of the species are both attractive and useful in battling a range of unwanted invertebrates like i.e. flatworms, pyramide snails.
These fish live of everything from zooplankton to large crustaceans, sea urchins and the like.

The needs and behaviour of Wrasses vary greatly, so it is vital to familiarize oneself with the specific species before buying one.

FishBase
Aquarium trade Yes
Distribution Indo-Pacific: Red Sea to South Africa (Ref. 35918) and to the Tuamoto Islands, north to the Ryukyu Islands, south to New Caledonia. Formerly known as Vulnerable (A1d+2cd) (Y. Sadovy) but now listed as Endangered in IUCN 2004 and listed in Appendix II of
English common names Humphead
Maori wrasse
Humphead maori wrasse
Humphead wrasse
Double-headed maori wrasse
Giant maori wrasse
Giant humphead wrasse
Humhead wrasse
Napoleon wrasse
French common names Kakatoi vareur
Napoléon
Danish common names Napoleonsfisk
References and further reading

About references

Scott Michael. 2004. Aquarium Fish: The Cheeklined Maori Wrasse, Cheilinus diagrammus - Advanced Aquarist - (English)
Bob Fenner. Maori/Splendour Wrasses, the Genera Cheilinus & (to): Oxycheilinus - Wet Web Media - (English)

Scott W. Michael. 2009. Wrasses and Parrotfishes (Reef Fishes Series Book 5) - TFH Publications / Microcosm Ltd. - (English)