''Danio'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of small

freshwater fish Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%. These environments differ from marine conditions in many ways, especially the difference in levels of s ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Cyprinidae Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest verte ...

found in

South South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...

and

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...

, commonly kept in aquaria. They are generally characterised by a pattern of horizontal stripes, rows of spots or vertical bars. Some

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

have two pairs of long

barbel Barbel may refer to: *Barbel (anatomy), a whisker-like organ near the mouth found in some fish (notably catfish, loaches and cyprinids) and turtles *Barbel (fish), a common name for certain species of fish **''Barbus barbus'', a species of cyprinid ...

s. Species of this genus consume various small aquatic

insects Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of j ...

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...

s and

worm Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (though not always). Worms vary in size from microscopic to over in length for marine polychaete wor ...

Taxonomy

The name ''"danio"'' comes from the Bangla name ''dhani'', meaning "of the rice field". ''Danio'' was described in the early 19th century by Francis Hamilton. Two of the species included by him in the genus, still remain valid—''D. dangila'' and ''D. rerio''. About a century later (1916) and with many more species described in the meantime, the genus was split; the larger species into ''Danio'' and the smaller species into the genus ''Brachydanio''.Spence, R., Gerlach, G., Lawrence, C. & Smith, C. (2007)
The behaviour and ecology of the zebrafish, ''Danio rerio''.
''Biological Reviews'', 83 (1): 13–34. In 1991, though, the two genera were recombined; most larger species formerly within the genus ''Danio'' have now been reclassified into the genus ''

Devario ''Devario'' is a genus of fish in the family Cyprinidae native to the rivers and streams of South and Southeast Asia. These fishes have short barbels and many species having vertical or horizontal stripes. These species consume various small, a ...

''. Also, ''Brachydanio'' is now a

junior synonym The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linna ...

of ''Danio''.Fang, F. (2003)
Phylogenetic Analysis of the Asian Cyprinid Genus ''Danio'' (Teleostei, Cyprinidae).
''Copeia'', 2003 (4): 714–728.

Species

There are currently 27 recognized species in this genus: * '' Danio absconditus'' S. O. Kullander &

Britz Britz () is a German locality (''Ortsteil'') within the Berlin borough (''Bezirk'') of Neukölln. History The village of ''Britzig'' was first mentioned in 1273. It was incorporated by the 1920 Greater Berlin Act. It is known for being the sit ...

, 2015Kullander, S.O. & Britz, R. (2015)
Description of ''Danio absconditus'', new species, and redescription of ''Danio feegradei'' (Teleostei: Cyprinidae), from the Rakhine Yoma hotspot in south-western Myanmar.
''Zootaxa, 3948 (2): 233–247.'' (Black-barred danio) * ''

Danio aesculapii The panther danio (''Danio aesculapii'') is a species of danio endemic to Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only som ...

'' S. O. Kullander & F. Fang, 2009 (Panther danio) * '' Danio albolineatus'' ( Blyth, 1860) (Pearl danio) * ''

Danio annulosus ''Danio annulosus'' is a species of Chain danio fish in the family Cyprinidae in Danio genus. The species is named and described jointly by Sven O Kullander, M.D Mizanur Rahman, Michael Noren and Abdur Rob Mollah in 2015 in association with the ...

'' S. O. Kullander, Rahman, Norén & Mollah, 2015Kullander, S.O., Rahman, M.M., Norén, M. & Mollah, A.R. (2015)
''Danio annulosus'', a new species of chain ''Danio'' from the Shuvolong Falls in Bangladesh (Teleostei: Cyprinidae: Danioninae).
''Zootaxa, 3994 (1): 53–68.'' * ''

Danio assamila ''Danio assamila'' is a species of ''Danio'' found in the Brahmaputra River drainage in India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most po ...

'' S. O. Kullander, 2015Kullander, S.O. (2015)
Taxonomy of chain ''Danio'', an Indo-Myanmar species assemblage, with descriptions of four new species (Teleostei: Cyprinidae).
''Ichthyological Exploration of Freshwaters, 25 (4): 357–380.'' * ''

Danio catenatus ''Danio catenatus'' is a species of ''Danio'' found in the Thandwe Chaung River drainage in Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British Engli ...

'' S. O. Kullander, 2015 * ''

Danio choprae The glowlight danio (''Danio choprae'') is a small, schooling fish closely related to the popular zebrafish ''Danio rerio''. This should not be confused with the GloFishbr> a trademarked brand of fluorescent zebrafish that appear to glow in the d ...

'' Hora, 1928 (Glowlight danio) * '' Danio concatenatus'' S. O. Kullander, 2015 * '' Danio dangila'' ( F. Hamilton, 1822) (Moustached danio) * '' Danio erythromicron'' ( Annandale, 1918) (Emerald dwarf rasbora) * '' Danio feegradei'' Hora, 1937 (Yoma danio) * ''

Danio flagrans ''Danio flagrans'' is a species of ''Danio'' found in the upper Mali Hka river drainage in northern Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in Britis ...

'' S. O. Kullander, 2012Kullander, S.O. (2012)
Description of ''Danio flagrans'', and redescription of ''D. choprae'', two closely related species from the Ayeyarwaddy River drainage in northern Myanmar (Teleostei: Cyprinidae).
''Ichthyological Exploration of Freshwaters, 23 (3): 245–262.'' * '' Danio htamanthinus'' S. O. Kullander & Norén, 2016Kullander, S.O. & Norén, M. (2016)
''Danio htamanthinus'' (Teleostei: Cyprinidae), a new species of miniature cyprinid fish from the Chindwin River in Myanmar.
''Zootaxa, 4178 (4): 535-546.'' * '' Danio jaintianensis'' ( N. Sen, 2007) * '' Danio kerri'' H. M. Smith, 1931 (Blue danio) * '' Danio kyathit'' F. Fang, 1998 * ''

Danio margaritatus ''Danio margaritatus'', the celestial pearl danio, often referred to in the aquarium trade as galaxy rasbora or ''Microrasbora'' sp. 'Galaxy',Clarke (2007b) is a small cyprinid from Myanmar. It has so far been found only in a very small area near ...

'' ( T. R. Roberts, 2007) (Galaxy rasbora or celestial pearl danio) * '' Danio meghalayensis'' N. Sen & S. C. Dey, 1985 (Meghalaya danio) * '' Danio muongthanhensis'' Nguyen, 2001 * ''

Danio nigrofasciatus The spotted danio or dwarf danio (''Danio nigrofasciatus'') is a tropical fish belonging to the minnow family ( Cyprinidae). Originating in northern Myanmar, this fish is sometimes found in community tanks by fish-keeping hobbyists. It grows to a ...

'' ( F. Day, 1870) (Spotted danio or dwarf danio) * '' Danio quagga'' S. O. Kullander, T. Y. Liao & F. Fang, 2009 * '' Danio quangbinhensis'' Nguyen, Le & Nguyen, 1999 * ''

Danio rerio The zebrafish (''Danio rerio'') is a freshwater fish belonging to the minnow family (Cyprinidae) of the order Cypriniformes. Native to South Asia, it is a popular aquarium fish, frequently sold under the trade name zebra danio (and thus often ...

'' ( F. Hamilton, 1822) (Zebra danio or zebrafish) * '' Danio roseus'' F. Fang &

Kottelat Maurice Kottelat (born 16 July 1957 in Delémont, SwitzerlandC ...

, 2000 (Rose danio) * '' Danio sysphigmatus'' S. O. Kullander, 2015 * '' Danio tinwini'' S. O. Kullander & F. Fang, 2009 (Gold-ring danio) * ''

Danio trangi ''Danio trangi'' is a species of ''Danio'' endemic to Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast A ...

'' Ngo, 2003

References

{{Taxonbar, from=Q901804 Fish of Southeast Asia Fish of South Asia Taxa named by Francis Buchanan-Hamilton