This issue introduces a beautiful blue medaka of medaka a brief description of the maximum standard length of the habitat of origin to maintain the conditions of water diet polytrophic two-state reproduction remarks

Subadult male, about 15 mm

Nigerians ; Details of the back of the body

<h1>Briefly</h1>

Medaka, a large family in the order Silver Han fish, shares in this issue a steel-blue medaka of medaka, which is one of the more peculiar of medaka.

Adult males; F. g。 Nigerianus 'P82' series.

<h1>Origin</h1>

It is native to the Cross River system in southeastern Nigeria and western Cameroon and the Benue River drainage system in central Nigeria.

Adult males; F. g。 Nigerian subspecies

<h1>habitat</h1>

Most forms inhabit streams, swamps, streams and pools in moist, forested highland savannahs and rainforest areas.

Adult males; Population of Akure.

<h1>Maximum standard length</h1>

50 - 55 mm.

Adult males; Population of Ensuka

<h1>maintenance</h1>

The setup doesn't need to be too complicated, but the fish tank must have a lid, as this fish has an amazing bouncing ability.

It is recommended to provide adequate forms of coverage for aquatic plants such as aquatic plants.

Adult males; Ornamental albinism strains

<h1>Water conditions</h1>

Temperature: 20 - 26°C

pH： 6.0-7.5

Hardness: 18 - 179 ppm

Adult males; Watch the 'golden' strain

Medaka adapts to the water temperature environment of 18 ~ 26 ° C, generally should not exceed 30 ° C, although some species can tolerate high temperatures close to 40 ° C, but too high temperatures will lead to shortened life span and humpback disease and other problems.

Adult males; Ornamental "golden" strains exhibit aggressive behavior.

<h1>diet</h1>

It is mainly used to feed small aquatic crustaceans, worms, insect larvae and other zooplankton trace predators, but algae and other plant material can also be used.

<h1>polyculture</h1>

Males can attack each other, and if the fish tank contains enough shelter, there can usually be multiple males in a group, but ideally, each male has 2-3 females so as not to be overly noticed by the males.

Adult male. Nigerians ; Aggressive mood

<h1>Sexual dimorphism</h1>

Males become larger, more colorful, and longer than females.

Adult females; Watch the 'golden' strain

Adult pairs, male frontline;

<h1>reproduction</h1>

<h1>remark</h1>

Medaka don't grow very old — or not the kind of "old" traditionally understood — they don't mature like other fish, and in fact many medaka species die within a year. One of them has a lifespan of less than 3 months, making them the shortest surviving species of vertebrates.

Adult pairs; Ornamental albinism strains

Some medaka species reproduce in a completely different way from other fish, and in fact one class of medaka reproduces in a way that is different from any other vertebrate in the world. Mangrove medaka takes the female isomeric strategy of having both female and male sex organs on individual individuals, which it uses to insert into other individuals and allow the eggs to develop in vivo. This condition is extremely rare in fish.

Juvenile in a round 10 mm