Kedah Danio
Encyclopedia
The Kedah Danio is a color morph of the fish species pearl danio
. It is a tropical fish
belonging to the Danio
family (Cyprinidae). Originating from South-east Asia
in south Thailand
, Kedah
and Sumatra
, this fish is rarely found in the fish keeping hobby, usually accidentally mixed with the pearl danio.
The fish is similar to D. albolineatus, but is easily distinguished from it by virtue of its markings. It has a prominent, almost luminous, brilliant orange line from the tail to below the dorsal, which in some specimens extends almost to the gills. Below this is a steel or powder blue line. Above the main orange line is a further fainter blue line which peters out below the dorsal and below the main blue line a further faint orange line which, again, usually expires under the dorsal. In some specimens, a faint mottle of blue and orange spots is visible on the chest below the orange and blue lines. In the female, the main orange line often has a slight kink below the dorsal.
When in sunlight, the Kedah danio shines in steel blue and purple and can be (and frequently has been) mistaken for Danio kerri, however it lacks the broad blue band, more yellow coloration and deeper body of D. kerri.
It was described by Dr Martin Brittan in 1956 and named after Dr Tweedie, Director of the Raffles Museum and Library, Singapore. Subsequently it was deemed to be a synonym of Danio albolineatus, a status which may or may not become permanent.
The Kedah danio is a peaceful, active schooling fish that is usually kept in groups. They prefer a well planted environment but still need plenty of space to school. Kedah Danios prefer water with a 6.5 to 7.0 pH
, a water hardness of 8 to 12 dGH
, and a temperature range of 70 to 77 °F (21 to25 °C).
Kedah danios are egg-scatterers that spawn among a course gravel bed (marbles or java moss are often used by hobbyists). They will typically spawn
at the first light of day. The eggs will hatch in approximately 36–48 hours.
Pearl Danio
The Pearl Danio is a tropical fish belonging to the minnow family . Originating in Sumatra, Burma, and Thailand, this fish is sometimes found in community tanks by fish keeping hobbyists. It grows to a maximum length of 2.6 inches and lives for around 5 years...
. It is a tropical fish
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...
belonging to the Danio
Danio
The Danio genus comprises many of the species of danionins familiar to aquarists. The common name "danio" is used for members of the genera Danio and Devario.-Taxonomy:...
family (Cyprinidae). Originating from South-east Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
in south Thailand
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...
, Kedah
Kedah
Kedah is a state of Malaysia, located in the northwestern part of Peninsular Malaysia. The state covers a total area of over 9,000 km², and it consists of the mainland and Langkawi. The mainland has a relatively flat terrain, which is used to grow rice...
and Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
, this fish is rarely found in the fish keeping hobby, usually accidentally mixed with the pearl danio.
The fish is similar to D. albolineatus, but is easily distinguished from it by virtue of its markings. It has a prominent, almost luminous, brilliant orange line from the tail to below the dorsal, which in some specimens extends almost to the gills. Below this is a steel or powder blue line. Above the main orange line is a further fainter blue line which peters out below the dorsal and below the main blue line a further faint orange line which, again, usually expires under the dorsal. In some specimens, a faint mottle of blue and orange spots is visible on the chest below the orange and blue lines. In the female, the main orange line often has a slight kink below the dorsal.
When in sunlight, the Kedah danio shines in steel blue and purple and can be (and frequently has been) mistaken for Danio kerri, however it lacks the broad blue band, more yellow coloration and deeper body of D. kerri.
It was described by Dr Martin Brittan in 1956 and named after Dr Tweedie, Director of the Raffles Museum and Library, Singapore. Subsequently it was deemed to be a synonym of Danio albolineatus, a status which may or may not become permanent.
The Kedah danio is a peaceful, active schooling fish that is usually kept in groups. They prefer a well planted environment but still need plenty of space to school. Kedah Danios prefer water with a 6.5 to 7.0 pH
PH
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...
, a water hardness of 8 to 12 dGH
DGH
Degrees of general hardness is a unit of water hardness, specifically of general hardness.General hardness is a measure of the concentration of metal divalent ions such as calcium and magnesium per volume of water...
, and a temperature range of 70 to 77 °F (21 to25 °C).
Kedah danios are egg-scatterers that spawn among a course gravel bed (marbles or java moss are often used by hobbyists). They will typically spawn
Spawn (biology)
Spawn refers to the eggs and sperm released or deposited, usually into water, by aquatic animals. As a verb, spawn refers to the process of releasing the eggs and sperm, also called spawning...
at the first light of day. The eggs will hatch in approximately 36–48 hours.