Blue Danio
Encyclopedia
The Blue Danio or Kerr's Danio (Danio kerri) is a tropical fish
belonging to the Danio
family (Cyprinidae).
on the islands of Langkawi
and Ko Yao Yai in the Malaysian Peninsula, this fish is sometimes found in the fish keeping hobby. It is a blue
colored, deep bodied Danio with several pinkish/gold lines from tail
to gill
s which may or may not be continuous, over a powder blue side.
The Blue 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. Blue Danios prefer 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).
Blue Danios are egg-scatterers that spawn
among a coarse gravel bed. They will typically spawn
at the first light of day. The eggs will hatch in approximately 36 hours.
The taxonomic name honors A.F.G. Kerr
, who collected the first specimen on Ko Yao Yai in 1929.
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).
Description
Originating from South-east AsiaAsia
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...
on the islands of Langkawi
Langkawi
Langkawi, officially known as Langkawi, the Jewel of Kedah is an archipelago of 104 islands in the Andaman Sea, some 30 km off the mainland coast of northwestern Malaysia. The islands are a part of the state of Kedah, which is adjacent to the Thai border...
and Ko Yao Yai in the Malaysian Peninsula, this fish is sometimes found in the fish keeping hobby. It is a blue
Blue
Blue is a colour, the perception of which is evoked by light having a spectrum dominated by energy with a wavelength of roughly 440–490 nm. It is considered one of the additive primary colours. On the HSV Colour Wheel, the complement of blue is yellow; that is, a colour corresponding to an equal...
colored, deep bodied Danio with several pinkish/gold lines from tail
Tail
The tail is the section at the rear end of an animal's body; 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, reptiles, and birds...
to gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...
s which may or may not be continuous, over a powder blue side.
The Blue 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. Blue Danios prefer water with a 6.5 - 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 - 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 73 - 77 F (23-25 C).
Blue Danios are egg-scatterers that 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...
among a coarse gravel bed. 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 hours.
The taxonomic name honors A.F.G. Kerr
Arthur Francis George Kerr
Arthur Francis George Kerr was an Irish medical doctor. He is known particularly now for his botanical work, which was important for the study of the flora of Thailand....
, who collected the first specimen on Ko Yao Yai in 1929.