Bluecheek butterflyfish

The bluecheek butterflyfish has a bright yellow body marked with thin vertical red lines. There a greyish patch behind the eyes, whereas most related species have an eye bar. The dorsal, anal, pelvic and caudal fins are yellow.{{cite web | url = http://www.saltcorner.com/AquariumLibrary/browsespecies.php?CritterID=533 | title = Chaetodon semilarvatus | author = Bob Goemans | year = 2012 | access-date = 29 December 2020 | work = Saltcorner}} It is a relatively large species of butterflyfish which can attain a maximum total length of {{convert|23|cm|in}}, although {{convert|15|cm|in}} is more typical.

The bluecheek butterflyfish is found in the north-western Indian Ocean where it occurs in the Red Sea and the Gulf of Aden, as far east as the coast of Oman.

The bluecheek butterflyfish is one of the few fish species to have long-term mates.{{cite book | author1 = Karen McGhee | author2 = George Mckay | title = Encyclopedia of animals | year = 2007 | publisher = National Geographic Books | isbn = 978-0-7922-5936-7}} In the wild, the fish eats hard corals as well as benthic invertebrates.{{cite book | author = Tristan Lougher | year = 2006 | title = What Fish?: A Buyer's Guide to Marine Fish | publisher = Interpet Publishing | page = 75 | isbn = 978-1-84286-118-9}} This is a common species which is found in areas with rich coral growth. They are frequently recorded in pairs or in small shoals. They have been known to occasionally hover in a stationary position for long periods beneath ledges of plate corals of the genus Acropora. It is oviparous species which forms pairs when spawning. This is normally during the day and the fishes emerge and are active at night. They are found at depths between {{convert|1|and|20|m|ft}}.

The bluecheek butterflyfish was first formally described in 1831 by the French anatomist Georges Cuvier with the type locality given as the Red Sea at Massawa, Eritrea and Al-Luhayya, Yemen.{{Cof genus | genus = Chaetodon | access-date = 29 December 2020}} It belongs to the large subgenus Rabdophorus which might warrant recognition as a distinct genus. In this group, it seems closest to a group containing the blackback butterflyfish (C. melannotus), the spot-naped butterflyfish (C. oxycephalus), or the peculiar black-wedged butterflyfish (C. falcula) and Pacific double-saddle butterflyfish or "false falcula", (C. ulietensis). Though the present species does not share their white body with black on the back and caudal peduncle and even lacks the typical eyestripe of Chaetodon, it has the same tell-tale blue vertical lines as these species.{{cite journal | author1 = Fessler, Jennifer L. | author2 = Westneat, Mark W | year = 2007 | title = Molecular phylogenetics of the butterflyfishes (Chaetodontidae): Taxonomy and biogeography of a global coral reef fish family | journal = Molecular Phylogenetics and Evolution | volume = 45 | issue = 1 | pages = 50–68 | doi = 10.1016/j.ympev.2007.05.018| pmid = 17625921 | bibcode = 2007MolPE..45...50F }}{{cite journal | author1 = Hsu, Kui-Ching | author2 = Chen, Jeng-Ping | author3 = Shao, Kwang-Tsao | name-list-style = amp | year = 2007 | title = Molecular phylogeny of Chaetodon (Teleostei: Chaetodontidae) in the Indo-West Pacific: evolution in geminate species pairs and species groups | journal = Raffles Bulletin of Zoology Supplement | volume = 14 | pages = 77–86 | url = http://rmbr.nus.edu.sg/rbz/biblio/s14/s14rbz10_Hsu-pp77-86.pdf | access-date = 2008-09-02 | archive-date = 2007-08-11 | archive-url = https://web.archive.org/web/20070811042056/http://rmbr.nus.edu.sg/rbz/biblio/s14/s14rbz10_Hsu-pp77-86.pdf | url-status = dead }}

{{Reflist}}

• {{smallcaps|Fessler, Jennifer L. & Westneat, Mark W.}} (2007): Molecular phylogenetics of the butterflyfishes (Chaetodontidae): Taxonomy and biogeography of a global coral reef fish family. Mol. Phylogenet. Evol. 45(1): 50–68. {{doi|10.1016/j.ympev.2007.05.018}} (HTML abstract)
• {{smallcaps|FishBase}} (2008): [http://www.fishbase.org/Summary/SpeciesSummary.php?id=12300 Chaetodon semilarvatus]. Version of 2008-JUL-24. Retrieved 2008-SEP-01.
• {{smallcaps|Hsu, Kui-Ching; Chen, Jeng-Ping & Shao, Kwang-Tsao}} (2007): Molecular phylogeny of Chaetodon (Teleostei: Chaetodontidae) in the Indo-West Pacific: evolution in geminate species pairs and species groups. Raffles Bulletin of Zoology Supplement 14: 77–86. [https://web.archive.org/web/20070811042056/http://rmbr.nus.edu.sg/rbz/biblio/s14/s14rbz10_Hsu-pp77-86.pdf PDF fulltext]

{{Commons category|Chaetodon semilarvatus}}

• {{SealifePhotos|218742}}

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Category:Chaetodon

Category:Fish described in 1831

Category:Taxa named by Georges Cuvier