Ricefish

Ricefish

Taxobox
name = Ricefishes


image_width = 250px
image_caption = Medaka, "Oryzias latipes"
regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Beloniformes
familia = Adrianichthyidae
subdivision_ranks = Genera
subdivision = "Adrianichthys"
"Horaichthys"
"Oryzias"
"Xenopoecilus" (disputed)

The ricefishes are a family (Adrianichthyidae) of small ray-finned fish that are found in fresh and brackish waters from India to Japan and out into the Indo-Australian Archipelago, most notably Sulawesi. About 27 species, some extremely rare and endangered, and some 2-4 may already be extinct.

Most of these species are quite small, with maximum lengths in the 2-4 cm range, making them of interest for aquaria.

Several species carry their eggs attached to the body between their pelvic fins.

The medaka, "Oryzias latipes", is a popular model organism used in research in developmental biology.

Genetic study of the family suggests that it originally evolved on Sulawesi and spread from there to the Asian mainland; the supposed genus "Xenopoecilus" are apparently unrelated, morphologically divergent species of "Oryzias" (Takehana "et al.", 2005).

ee also

*Beloniformes
*Gallery of beloniform fishes

References

* Takehana, Yusuke; Naruse, Kiyoshi & Sakaizumi, Mitsuru (2005): Molecular phylogeny of the medaka fishes genus "Oryzias" (Beloniformes: Adrianichthyidae) based on nuclear and mitochondrial DNA sequences. "Molecular Phylogenetics and Evolution" 36(2): 417–428. DOI|10.1016/j.ympev.2005.01.016

External links

* [http://www.fishbase.org/Summary/FamilySummary.cfm?ID=210 FishBase info for Adrianichthyidae]
* [http://www.flmnh.ufl.edu/fish/tropical/JSA/adrian.htm Genetic study of ricefishes]


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