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Beloniformes
	Exocoetus volitans
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Ovalentaria
Order:	Beloniformes; L. S. Berg, 1937
Type species
	Belone belone; Linnaeus 1761
Families
	Suborder Adrianichthyoidei Adrianichthyidae; ; Suborder Exocoetoidei Superfamily Scomberesocoidea Belonidae; Scomberesocidae; ; Superfamily Exocoetoidea Exocoetidae; Hemiramphidae; Zenarchopteridae; ; ;
Synonyms
	Exocoetiformes; Scomberesociformes;

Beloniformes /ˈbɛlənɪmɪfɔːrmiːz/ is an order composed of six families (and about 264 species) of freshwater and marine ray-finned fish:

Adrianichthyidae (ricefish and medakas)
Belonidae (needlefish)
Exocoetidae (flyingfishes)
Hemiramphidae (halfbeaks)
Scomberesocidae (sauries)
Zenarchopteridae (viviparous halfbeaks)^[2]

With the exception of the Adrianichthyidae, these are streamlined, medium-sized fishes that live close to the surface of the water, feeding on algae, plankton, or smaller animals including other fishes. Most are marine, though a few needlefish and halfbeaks inhabit brackish and fresh waters.^[3]

The order is sometimes divided up into two suborders, the Adrianichthyoidei and the Belonoidei, although this clade is referred to as Exocoetoidei in the 5th edition of Fishes of the World.^[4] The Adrianichthyoidei contain only a single family, the Adrianichthyidae. Originally, the Adrianichthyidae were included in the Cyprinodontiformes and assumed to be closely related to the killifish, but a closer relationship to the beloniforms is indicated by various characteristics including the absence of the interhyal, resulting in the upper jaw being fixed or not protrusible. The Belonoidei may also be further subdivided into two superfamilies, the Scomberesocoidea and the Exocoetoidea. The Scomberesocoidea contain the Belonidae and Scomberesocidae, while the Exocoetoidea comprise the Exocoetidae, Hemiramphidae and Zenarchopteridae.^[5]^[4] However, newer evidence shows the flyingfishes are nested within the halfbeaks, and the needlefish and sauries are nested within the subfamily Zenarchopterinae of the family Hemiramphidae, which has been recognized as its own family. The sauries are also nested within the family Belonidae.^[6]

The beloniforms display an interesting array of jaw morphologies. The basal condition in the order excluding the ricefishes is an elongated lower jaw in juveniles and adults as represented in halfbeaks. In the needlefish and sauries, both jaws are elongated in the adults; the juveniles of most species develop through a "halfbeak stage" before having both jaws elongated. The elongated lower jaw is lost in adults and is lost in most juveniles in the flyingfishes and some halfbeak genera.^[6]

They are known for many commercial uses, and have about 260 different species. Beloniformes lack a complete sequence of mitogenomes. This leads to many variations in mtDNA, about 35 different ones. To understand evolution for Beloniformes and to identify the larvae, scientists will use Beloniformes to help them study this.^[7]

Timeline of genera

References

^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Belone". Catalog of Fishes. California Academy of Sciences. Retrieved 28 July 2019.
^ Froese, R. and D. Pauly. Editors. "Order Summary for Beloniformes". FishBase. Retrieved 2007-02-10. {{cite web}}: |author= has generic name (help)
^ Helfman G., Collette B., & Facey D.: The Diversity of Fishes, Blackwell Publishing, pp 274–276, 1997, ISBN 0-86542-256-7
^ ^a ^b J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. p. 363. ISBN 978-1-118-34233-6. Archived from the original on 2019-04-08. Retrieved 2019-07-28.
^ Nelson, Joseph S. (2006). Fishes of the World. John Wiley & Sons, Inc. ISBN 978-0-471-25031-9.
^ ^a ^b Lovejoy, N; Iranpour, M; Collette, B (2004). "Phylogeny and Jaw Ontogeny of Beloniform Fishes". Integrative and Comparative Biology. 44 (5): 366–377. CiteSeerX 10.1.1.527.8541. doi:10.1093/icb/44.5.366. PMID 21676722.
^ Lu, Songhui; Zheng, Zhijia; Cen, Jingyi; Gao, Jian; Cao, Rongbo; Dong, Yuelei; Cui, Lei (2018-11-15). "Mitochondrial genome of the garfish Hyporhamphus quoyi (Beloniformes: Hemiramphidae) and phylogenetic relationships within Beloniformes based on whole mitogenomes". PLOS ONE. 13 (11): e0205025. Bibcode:2018PLoSO..1305025C. doi:10.1371/journal.pone.0205025. ISSN 1932-6203. PMC 6237333. PMID 30439949.

Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2011-05-17.