Halichoeres leucoxanthus
A small, colorful wrasse endemic to the Indian Ocean.
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Halichoeres leucoxanthus, commonly known as the canarytop wrasse, whitebelly wrasse, or lemon meringue wrasse, is a small fish in the wrasse family endemic to the Indian Ocean. It reaches a maximum length of 12 cm and has a thin, elongate body with a terminal mouth. Its bright yellow and white coloration varies with age, making it a distinctive species in reef aquariums.
Scientific classification
- KingdomAnimalia
- PhylumChordata
- ClassActinopterygii
- DivisionTeleostei
- OrderLabriformes
- FamilyLabridae
- GenusHalichoeres
- SpeciesHalichoeres leucoxanthus
Named by J. E. Randall & Smith, 1982
Close relatives
Other species of Halichoeres with a Codexery entry.
- Blackear wrasse Halichoeres poeyi
- Checkerboard wrasse Halichoeres hortulanus
- Halichoeres californicus Halichoeres californicus
- Halichoeres maculipinna Halichoeres maculipinna
- Halichoeres prosopeion Halichoeres prosopeion
- Halichoeres sanchezi Halichoeres sanchezi
- Halichoeres scapularis Halichoeres scapularis
- Halichoeres socialis Halichoeres socialis
Sources: Wikipedia taxobox: Halichoeres leucoxanthus (CC BY-SA 4.0) · differs from this box at order: WoRMS AphiaID 275770 (CC BY 4.0)
Conservation status
Least Concern (LC)
- LC▲ this species
- NT
- VU
- EN
- CR
- EW
- EX
Source: IUCN Red List assessment · GBIF copy of the Red List category
How big is it?
Largest length in the source, 0.12 m, next to a 1.8 m person.
Diagram: drawn by Codexery, schematic shapes to scale (not a likeness). Length: Wikipedia: Halichoeres leucoxanthus
Where the halichoeres leucoxanthus has been recorded
Each dot is a place where the species has been observed and reported (59 records, half-degree grid) — not a modelled range.
Map: drawn by Codexery. Data: GBIF occurrence search (records CC0 / CC BY) · Natural Earth basemap (public domain) · place coordinates: Wikipedia (CC BY-SA 4.0)
Lore & Background
The canarytop wrasse is widespread throughout tropical and subtropical waters of the Indian Ocean, from the Laccadive, Maldives, and Chagos archipelagos to the island of Java in Indonesia, including the Andaman Sea. It inhabits rubble and sandy areas close to coral reefs at depths of 10 to 50 meters. The species lives in small groups and is a benthic predator, feeding mainly on small marine invertebrates such as crustaceans, molluscs, worms, and echinoderms captured on or in the substrate.
Like most wrasses, Halichoeres leucoxanthus is a protogynous hermaphrodite: individuals start life as females with the capability of turning male later on. The juvenile phase is entirely bright yellow with two black ocellus on the dorsal fin and one on the caudal peduncle. In the initial phase, the body shows two colors—white on the belly and bright yellow on the back—with the same ocellus plus an additional one on the first spines of the dorsal fin. During the terminal phase, only a few changes occur, such as the head becoming a mix of yellowish and greenish with pinkish lines, and the ocellus tending to blur with age.
Reader's Guide
The canarytop wrasse is notable for its striking color changes through life stages, from a completely bright yellow juvenile with distinct black ocellus to a terminal phase with a yellowish-greenish head and pinkish lines. Its small size, reaching only 12 cm, and its benthic predatory feeding on small invertebrates make it a suitable species for reef aquariums that can provide rubble and sandy substrates. The species is targeted but not thought to be threatened by the aquarium trade, indicating a stable wild population. Its protogynous hermaphroditism, where individuals begin as females and may later become males, adds biological interest.
The wrasse's distribution across the Indian Ocean, from the Laccadive and Maldives archipelagos to Java and the Andaman Sea, reflects its adaptability to tropical and subtropical waters. The gradual blurring of its ocellus with age is a distinctive feature that distinguishes it from other wrasses. Overall, Halichoeres leucoxanthus represents a colorful and manageable addition to marine aquariums, with a life history that offers both aesthetic and educational value.
More in Reef Aquarium Fish Species
Sources
Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.
- Wikipedia: Halichoeres leucoxanthus (CC BY-SA 4.0).
- Classification: the source article's taxobox; compare WoRMS, the World Register of Marine Species (CC BY 4.0).
- Conservation status: IUCN Red List assessment.
- Occurrence records: GBIF (CC0 / CC BY). Basemap: Natural Earth (public domain).
- Word definitions: the Codexery glossary, each quoted from its Wikipedia article.
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