The blue danio, Kerr's danio or turquoise danio (''Danio kerri''), is a

tropical fish Tropical fish are generally those fish found in aquatic tropical environments around the world. Fishkeepers often keep tropical fish in freshwater and saltwater aquariums. The term "tropical fish" is not a taxonomic group, but rather is a ge ...

belonging to the genus ''

Danio ''Danio'' is a genus of small freshwater fish in the family Cyprinidae found in South and Southeast Asia, commonly kept in aquaria. They are generally characterised by a pattern of horizontal stripes, rows of spots or vertical bars. Some species ...

'' in family

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 v ...

Distribution and habitat

The blue danio is found on the islands of

Langkawi Langkawi, officially known by its sobriquet Langkawi, the Jewel of Kedah ( ms, Langkawi Permata Kedah ), is a duty-free island and an archipelago of 99 islands (plus five small islands visible only at low tide in the Strait of Malacca) locat ...

and

Ko Yao Yai Ko Yao Yai is the larger of the two big islands in the Ko Yao Archipelago. The island group is in Phang Nga Bay in the Phang Nga Province of southern Thailand. ''Ko Yao Yai'' means 'big long island'. The other main island of the group is ''Ko Yao ...

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

Description

It is a blue-colored, deep-bodied danio with several pinkish/gold lines from

tail The tail is the section at the rear end of certain kinds of animals’ bodies; in general, the term refers to a distinct, flexible appendage to the torso. It is the part of the body that corresponds roughly to the sacrum and coccyx in mammals ...

gill A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they ar ...

s which may or may not be continuous, over a powder blue side.

In the aquarium

The blue danio is a peaceful, active schooling fish, so is usually kept in groups. They prefer a well-planted environment, but still need plenty of space to school. Blue danios are often kept in water with a 6.5 – 7.0 pH, a water hardness of 8 – 12 dGH, and a temperature range of 73 – 77 °F (23–25 °C).

Mating

Blue danios are egg-scatterers that

spawn Spawn or spawning may refer to: * Spawn (biology), the eggs and sperm of aquatic animals Arts, entertainment, and media * Spawn (character), a fictional character in the comic series of the same name and in the associated franchise ** '' Spawn: ...

over coarse gravel beds. They will typically spawn at the first light of day. The eggs will hatch in about 36 hours.

Etymology

The taxonomic name honors A.F.G. Kerr, who collected the first specimen on Ko Yao Yai in 1929.

References

* *

External links

Danio kerri
{{Taxonbar, from=Q1123820 Danio Fish described in 1931 Fish of Thailand Cyprinid fish of Asia